diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8355d7959..9d39a4c12 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -19,10 +19,10 @@ build:
       - tests/
   tags:
     - builder
-    
+
 test:
   stage: test
-  dependencies: 
+  dependencies:
     - build
   script:
     - ./tests/betting_test
@@ -30,7 +30,7 @@ test:
     - ./tests/cli_test
   tags:
     - builder
-    
+
 code_quality:
   stage: test
   image: docker:stable
diff --git a/.gitmodules b/.gitmodules
index 4a2c72e06..5572259c0 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -3,6 +3,6 @@
     url = https://github.com/bitshares/bitshares-core.wiki.git
     ignore = dirty
 [submodule "libraries/fc"]
-	path = libraries/fc
-	url = https://github.com/PBSA/peerplays-fc.git
-  ignore = dirty
+    path = libraries/fc
+    url = https://github.com/PBSA/peerplays-fc.git
+    ignore = dirty
diff --git a/libraries/app/api.cpp b/libraries/app/api.cpp
index 73861eb8b..833069f8a 100644
--- a/libraries/app/api.cpp
+++ b/libraries/app/api.cpp
@@ -438,7 +438,12 @@ namespace graphene { namespace app {
             } case balance_object_type:{
                /** these are free from any accounts */
                break;
-            } 
+            } case son_object_type:{
+               const auto& aobj = dynamic_cast<const son_object*>(obj);
+               assert( aobj != nullptr );
+               accounts.insert( aobj->son_account );
+               break;
+            }
             case sport_object_type:
             case event_group_object_type:
             case event_object_type:
diff --git a/libraries/app/database_api.cpp b/libraries/app/database_api.cpp
index e692f1376..b9ae31b66 100644
--- a/libraries/app/database_api.cpp
+++ b/libraries/app/database_api.cpp
@@ -146,6 +146,12 @@ class database_api_impl : public std::enable_shared_from_this<database_api_impl>
       fc::optional<committee_member_object> get_committee_member_by_account(account_id_type account)const;
       map<string, committee_member_id_type> lookup_committee_member_accounts(const string& lower_bound_name, uint32_t limit)const;
 
+      // SON members
+      vector<optional<son_object>> get_sons(const vector<son_id_type>& son_ids)const;
+      fc::optional<son_object> get_son_by_account(account_id_type account)const;
+      map<string, son_id_type> lookup_son_accounts(const string& lower_bound_name, uint32_t limit)const;
+      uint64_t get_son_count()const;
+
       // Votes
       vector<variant> lookup_vote_ids( const vector<vote_id_type>& votes )const;
 
@@ -1682,6 +1688,81 @@ map<string, committee_member_id_type> database_api_impl::lookup_committee_member
    return committee_members_by_account_name;
 }
 
+//////////////////////////////////////////////////////////////////////
+//                                                                  //
+// SON members                                                      //
+//                                                                  //
+//////////////////////////////////////////////////////////////////////
+
+vector<optional<son_object>> database_api::get_sons(const vector<son_id_type>& son_ids)const
+{
+   return my->get_sons( son_ids );
+}
+
+vector<optional<son_object>> database_api_impl::get_sons(const vector<son_id_type>& son_ids)const
+{
+   vector<optional<son_object>> result; result.reserve(son_ids.size());
+   std::transform(son_ids.begin(), son_ids.end(), std::back_inserter(result),
+                  [this](son_id_type id) -> optional<son_object> {
+      if(auto o = _db.find(id))
+         return *o;
+      return {};
+   });
+   return result;
+}
+
+fc::optional<son_object> database_api::get_son_by_account(account_id_type account)const
+{
+   return my->get_son_by_account( account );
+}
+
+fc::optional<son_object> database_api_impl::get_son_by_account(account_id_type account) const
+{
+   const auto& idx = _db.get_index_type<son_index>().indices().get<by_account>();
+   auto itr = idx.find(account);
+   if( itr != idx.end() )
+      return *itr;
+   return {};
+}
+
+map<string, son_id_type> database_api::lookup_son_accounts(const string& lower_bound_name, uint32_t limit)const
+{
+   return my->lookup_son_accounts( lower_bound_name, limit );
+}
+
+map<string, son_id_type> database_api_impl::lookup_son_accounts(const string& lower_bound_name, uint32_t limit)const
+{
+   FC_ASSERT( limit <= 1000 );
+   const auto& sons_by_id = _db.get_index_type<son_index>().indices().get<by_id>();
+
+   // we want to order sons by account name, but that name is in the account object
+   // so the son_index doesn't have a quick way to access it.
+   // get all the names and look them all up, sort them, then figure out what
+   // records to return.  This could be optimized, but we expect the
+   // number of witnesses to be few and the frequency of calls to be rare
+   std::map<std::string, son_id_type> sons_by_account_name;
+   for (const son_object& son : sons_by_id)
+       if (auto account_iter = _db.find(son.son_account))
+           if (account_iter->name >= lower_bound_name) // we can ignore anything below lower_bound_name
+               sons_by_account_name.insert(std::make_pair(account_iter->name, son.id));
+
+   auto end_iter = sons_by_account_name.begin();
+   while (end_iter != sons_by_account_name.end() && limit--)
+       ++end_iter;
+   sons_by_account_name.erase(end_iter, sons_by_account_name.end());
+   return sons_by_account_name;
+}
+
+uint64_t database_api::get_son_count()const
+{
+   return my->get_son_count();
+}
+
+uint64_t database_api_impl::get_son_count()const
+{
+   return _db.get_index_type<son_index>().indices().size();
+}
+
 //////////////////////////////////////////////////////////////////////
 //                                                                  //
 // Votes                                                            //
@@ -1701,6 +1782,7 @@ vector<variant> database_api_impl::lookup_vote_ids( const vector<vote_id_type>&
    const auto& committee_idx = _db.get_index_type<committee_member_index>().indices().get<by_vote_id>();
    const auto& for_worker_idx = _db.get_index_type<worker_index>().indices().get<by_vote_for>();
    const auto& against_worker_idx = _db.get_index_type<worker_index>().indices().get<by_vote_against>();
+   const auto& son_idx = _db.get_index_type<son_index>().indices().get<by_vote_id>();
 
    vector<variant> result;
    result.reserve( votes.size() );
@@ -1743,6 +1825,16 @@ vector<variant> database_api_impl::lookup_vote_ids( const vector<vote_id_type>&
             }
             break;
          }
+         case vote_id_type::son:
+         {
+            auto itr = son_idx.find( id );
+            if( itr != son_idx.end() )
+               result.emplace_back( variant( *itr, 1 ) );
+            else
+               result.emplace_back( variant() );
+            break;
+         }
+
          case vote_id_type::VOTE_TYPE_COUNT: break; // supress unused enum value warnings
          default:
             FC_CAPTURE_AND_THROW( fc::out_of_range_exception, (id) );
diff --git a/libraries/app/impacted.cpp b/libraries/app/impacted.cpp
index 08253417b..997a3a381 100644
--- a/libraries/app/impacted.cpp
+++ b/libraries/app/impacted.cpp
@@ -298,6 +298,15 @@ struct get_impacted_account_visitor
    void operator()( const sweeps_vesting_claim_operation& op ) { 
       _impacted.insert( op.account );
    }
+   void operator()( const son_create_operation& op ){
+        _impacted.insert( op.owner_account );
+   }
+   void operator()( const son_update_operation& op ){
+      _impacted.insert( op.owner_account );
+   }
+   void operator()( const son_delete_operation& op ){
+      _impacted.insert( op.owner_account );
+   }
 };
 
 void operation_get_impacted_accounts( const operation& op, flat_set<account_id_type>& result )
diff --git a/libraries/app/include/graphene/app/database_api.hpp b/libraries/app/include/graphene/app/database_api.hpp
index 78a9ca1f9..d597110e7 100644
--- a/libraries/app/include/graphene/app/database_api.hpp
+++ b/libraries/app/include/graphene/app/database_api.hpp
@@ -43,6 +43,7 @@
 #include <graphene/chain/event_object.hpp>
 #include <graphene/chain/betting_market_object.hpp>
 #include <graphene/chain/global_betting_statistics_object.hpp>
+#include <graphene/chain/son_object.hpp>
 
 #include <graphene/chain/worker_object.hpp>
 #include <graphene/chain/witness_object.hpp>
@@ -568,6 +569,38 @@ class database_api
        */
       map<string, committee_member_id_type> lookup_committee_member_accounts(const string& lower_bound_name, uint32_t limit)const;
 
+      /////////////////
+      // SON members //
+      /////////////////
+
+      /**
+       * @brief Get a list of SONs by ID
+       * @param son_ids IDs of the SONs to retrieve
+       * @return The SONs corresponding to the provided IDs
+       *
+       * This function has semantics identical to @ref get_objects
+       */
+      vector<optional<son_object>> get_sons(const vector<son_id_type>& son_ids)const;
+
+      /**
+       * @brief Get the SON owned by a given account
+       * @param account The ID of the account whose SON should be retrieved
+       * @return The SON object, or null if the account does not have a SON
+       */
+      fc::optional<son_object> get_son_by_account(account_id_type account)const;
+
+      /**
+       * @brief Get names and IDs for registered SONs
+       * @param lower_bound_name Lower bound of the first name to return
+       * @param limit Maximum number of results to return -- must not exceed 1000
+       * @return Map of SON names to corresponding IDs
+       */
+      map<string, son_id_type> lookup_son_accounts(const string& lower_bound_name, uint32_t limit)const;
+
+      /**
+       * @brief Get the total number of SONs registered with the blockchain
+       */
+      uint64_t get_son_count()const;
 
       /// WORKERS
 
@@ -775,6 +808,12 @@ FC_API(graphene::app::database_api,
    (get_committee_member_by_account)
    (lookup_committee_member_accounts)
 
+   // SON members
+   (get_sons)
+   (get_son_by_account)
+   (lookup_son_accounts)
+   (get_son_count)
+
    // workers
    (get_workers_by_account)
    // Votes
diff --git a/libraries/chain/CMakeLists.txt b/libraries/chain/CMakeLists.txt
index a8d9e5db8..a8969c419 100644
--- a/libraries/chain/CMakeLists.txt
+++ b/libraries/chain/CMakeLists.txt
@@ -113,6 +113,8 @@ add_library( graphene_chain
 
              affiliate_payout.cpp
 
+             son_evaluator.cpp
+
              ${HEADERS}
              ${PROTOCOL_HEADERS}
              "${CMAKE_CURRENT_BINARY_DIR}/include/graphene/chain/hardfork.hpp"
diff --git a/libraries/chain/db_init.cpp b/libraries/chain/db_init.cpp
index b1fa74245..02634c06a 100644
--- a/libraries/chain/db_init.cpp
+++ b/libraries/chain/db_init.cpp
@@ -49,13 +49,12 @@
 #include <graphene/chain/tournament_object.hpp>
 #include <graphene/chain/match_object.hpp>
 #include <graphene/chain/game_object.hpp>
-
-
 #include <graphene/chain/sport_object.hpp>
 #include <graphene/chain/event_group_object.hpp>
 #include <graphene/chain/event_object.hpp>
 #include <graphene/chain/betting_market_object.hpp>
 #include <graphene/chain/global_betting_statistics_object.hpp>
+#include <graphene/chain/son_object.hpp>
 
 #include <graphene/chain/account_evaluator.hpp>
 #include <graphene/chain/asset_evaluator.hpp>
@@ -77,6 +76,7 @@
 #include <graphene/chain/event_evaluator.hpp>
 #include <graphene/chain/betting_market_evaluator.hpp>
 #include <graphene/chain/tournament_evaluator.hpp>
+#include <graphene/chain/son_evaluator.hpp>
 
 #include <graphene/chain/protocol/fee_schedule.hpp>
 
@@ -243,6 +243,9 @@ void database::initialize_evaluators()
    register_evaluator<lottery_reward_evaluator>();
    register_evaluator<lottery_end_evaluator>();
    register_evaluator<sweeps_vesting_claim_evaluator>();
+   register_evaluator<create_son_evaluator>();
+   register_evaluator<update_son_evaluator>();
+   register_evaluator<delete_son_evaluator>();
 }
 
 void database::initialize_indexes()
@@ -259,6 +262,7 @@ void database::initialize_indexes()
    acnt_index->add_secondary_index<account_referrer_index>();
 
    add_index< primary_index<committee_member_index, 8> >(); // 256 members per chunk
+   add_index< primary_index<son_index, 8> >(); // 256 sons per chunk
    add_index< primary_index<witness_index, 10> >(); // 1024 witnesses per chunk
    add_index< primary_index<limit_order_index > >();
    add_index< primary_index<call_order_index > >();
diff --git a/libraries/chain/db_maint.cpp b/libraries/chain/db_maint.cpp
index 3ec84d148..765d3c72c 100644
--- a/libraries/chain/db_maint.cpp
+++ b/libraries/chain/db_maint.cpp
@@ -253,7 +253,7 @@ void database::update_active_witnesses()
 void database::update_active_committee_members()
 { try {
    assert( _committee_count_histogram_buffer.size() > 0 );
-   share_type stake_target = (_total_voting_stake-_witness_count_histogram_buffer[0]) / 2;
+   share_type stake_target = (_total_voting_stake-_committee_count_histogram_buffer[0]) / 2;
 
    /// accounts that vote for 0 or 1 witness do not get to express an opinion on
    /// the number of witnesses to have (they abstain and are non-voting accounts)
@@ -326,6 +326,96 @@ void database::update_active_committee_members()
    });
 } FC_CAPTURE_AND_RETHROW() }
 
+void database::update_active_sons()
+{ try {
+   assert( _son_count_histogram_buffer.size() > 0 );
+   share_type stake_target = (_total_voting_stake-_son_count_histogram_buffer[0]) / 2;
+
+   /// accounts that vote for 0 or 1 son do not get to express an opinion on
+   /// the number of sons to have (they abstain and are non-voting accounts)
+
+   share_type stake_tally = 0;
+
+   size_t son_count = 0;
+   if( stake_target > 0 )
+   {
+      while( (son_count < _son_count_histogram_buffer.size() - 1)
+             && (stake_tally <= stake_target) )
+      {
+         stake_tally += _son_count_histogram_buffer[++son_count];
+      }
+   }
+
+   const chain_property_object& cpo = get_chain_properties();
+   auto sons = sort_votable_objects<son_index>(std::max(son_count*2+1, (size_t)cpo.immutable_parameters.min_son_count));
+
+   const global_property_object& gpo = get_global_properties();
+
+   const auto& all_sons = get_index_type<son_index>().indices();
+
+   for( const son_object& son : all_sons )
+   {
+      modify( son, [&]( son_object& obj ){
+              obj.total_votes = _vote_tally_buffer[son.vote_id];
+              });
+   }
+
+   // Update SON authority
+   modify( get(GRAPHENE_SON_ACCOUNT_ID), [&]( account_object& a )
+   {
+      if( head_block_time() < HARDFORK_533_TIME )
+      {
+         uint64_t total_votes = 0;
+         map<account_id_type, uint64_t> weights;
+         a.active.weight_threshold = 0;
+         a.active.clear();
+
+         for( const son_object& son : sons )
+         {
+            weights.emplace(son.son_account, _vote_tally_buffer[son.vote_id]);
+            total_votes += _vote_tally_buffer[son.vote_id];
+         }
+
+         // total_votes is 64 bits. Subtract the number of leading low bits from 64 to get the number of useful bits,
+         // then I want to keep the most significant 16 bits of what's left.
+         int8_t bits_to_drop = std::max(int(boost::multiprecision::detail::find_msb(total_votes)) - 15, 0);
+         for( const auto& weight : weights )
+         {
+            // Ensure that everyone has at least one vote. Zero weights aren't allowed.
+            uint16_t votes = std::max((weight.second >> bits_to_drop), uint64_t(1) );
+            a.active.account_auths[weight.first] += votes;
+            a.active.weight_threshold += votes;
+         }
+
+         a.active.weight_threshold /= 2;
+         a.active.weight_threshold += 1;
+      }
+      else
+      {
+         vote_counter vc;
+         for( const son_object& son : sons )
+            vc.add( son.son_account, std::max(_vote_tally_buffer[son.vote_id], UINT64_C(1)) );
+         vc.finish( a.active );
+      }
+   } );
+
+   modify(gpo, [&]( global_property_object& gp ){
+      gp.active_sons.clear();
+      gp.active_sons.reserve(sons.size());
+      std::transform(sons.begin(), sons.end(),
+                     std::inserter(gp.active_sons, gp.active_sons.end()),
+                     [](const son_object& s) {
+         return s.id;
+      });
+   });
+
+   //const witness_schedule_object& wso = witness_schedule_id_type()(*this);
+   //modify(wso, [&](witness_schedule_object& _wso)
+   //{
+   //   _wso.scheduler.update(gpo.active_witnesses);
+   //});
+} FC_CAPTURE_AND_RETHROW() }
+
 void database::initialize_budget_record( fc::time_point_sec now, budget_record& rec )const
 {
    const dynamic_global_property_object& dpo = get_dynamic_global_properties();
@@ -1239,6 +1329,7 @@ void database::perform_chain_maintenance(const signed_block& next_block, const g
          d._vote_tally_buffer.resize(props.next_available_vote_id);
          d._witness_count_histogram_buffer.resize(props.parameters.maximum_witness_count / 2 + 1);
          d._committee_count_histogram_buffer.resize(props.parameters.maximum_committee_count / 2 + 1);
+         d._son_count_histogram_buffer.resize(props.parameters.maximum_son_count / 2 + 1);
          d._total_voting_stake = 0;
 
          const vesting_balance_index& vesting_index = d.get_index_type<vesting_balance_index>();
@@ -1323,6 +1414,18 @@ void database::perform_chain_maintenance(const signed_block& next_block, const g
                // same rationale as for witnesses
                d._committee_count_histogram_buffer[offset] += voting_stake;
             }
+            if( opinion_account.options.num_son <= props.parameters.maximum_son_count )
+            {
+               uint16_t offset = std::min(size_t(opinion_account.options.num_son/2),
+                                          d._son_count_histogram_buffer.size() - 1);
+               // votes for a number greater than maximum_son_count
+               // are turned into votes for maximum_son_count.
+               //
+               // in particular, this takes care of the case where a
+               // member was voting for a high number, then the
+               // parameter was lowered.
+               d._son_count_histogram_buffer[offset] += voting_stake;
+            }
 
             d._total_voting_stake += voting_stake;
          }
@@ -1353,11 +1456,13 @@ void database::perform_chain_maintenance(const signed_block& next_block, const g
    };
    clear_canary a(_witness_count_histogram_buffer),
                 b(_committee_count_histogram_buffer),
+                d(_son_count_histogram_buffer),
                 c(_vote_tally_buffer);
 
    update_top_n_authorities(*this);
    update_active_witnesses();
    update_active_committee_members();
+   update_active_sons();
    update_worker_votes();
 
    modify(gpo, [this](global_property_object& p) {
diff --git a/libraries/chain/db_notify.cpp b/libraries/chain/db_notify.cpp
index 3404989a8..63b0fce8f 100644
--- a/libraries/chain/db_notify.cpp
+++ b/libraries/chain/db_notify.cpp
@@ -285,6 +285,15 @@ struct get_impacted_account_visitor
    void operator()( const sweeps_vesting_claim_operation& op ) {
       _impacted.insert( op.account );
    }
+   void operator()( const son_create_operation& op ) {
+      _impacted.insert( op.owner_account );
+   }
+   void operator()( const son_update_operation& op ) {
+       _impacted.insert( op.owner_account );
+   }
+   void operator()( const son_delete_operation& op ) {
+      _impacted.insert( op.owner_account );
+   }
 };
 
 void operation_get_impacted_accounts( const operation& op, flat_set<account_id_type>& result )
@@ -373,6 +382,11 @@ void get_relevant_accounts( const object* obj, flat_set<account_id_type>& accoun
         } case balance_object_type:{
            /** these are free from any accounts */
            break;
+        } case son_object_type:{
+           const auto& aobj = dynamic_cast<const son_object*>(obj);
+           assert( aobj != nullptr );
+           accounts.insert( aobj->son_account );
+           break;
         }
       }
    }
diff --git a/libraries/chain/hardfork.d/SON.hf b/libraries/chain/hardfork.d/SON.hf
new file mode 100644
index 000000000..355c5b96f
--- /dev/null
+++ b/libraries/chain/hardfork.d/SON.hf
@@ -0,0 +1,5 @@
+// SON HARDFORK Monday, September 21, 2020 1:43:11 PM
+#ifndef HARDFORK_SON_TIME
+#include <ctime>
+#define HARDFORK_SON_TIME (fc::time_point_sec( time(NULL) - (60 * 60) ))
+#endif
diff --git a/libraries/chain/include/graphene/chain/config.hpp b/libraries/chain/include/graphene/chain/config.hpp
index 5e4851b90..dd25b6ad3 100644
--- a/libraries/chain/include/graphene/chain/config.hpp
+++ b/libraries/chain/include/graphene/chain/config.hpp
@@ -90,8 +90,10 @@
 
 #define GRAPHENE_DEFAULT_MIN_WITNESS_COUNT                    (11)
 #define GRAPHENE_DEFAULT_MIN_COMMITTEE_MEMBER_COUNT           (11)
+#define GRAPHENE_DEFAULT_MIN_SON_COUNT                        (5)
 #define GRAPHENE_DEFAULT_MAX_WITNESSES                        (1001) // SHOULD BE ODD
 #define GRAPHENE_DEFAULT_MAX_COMMITTEE                        (1001) // SHOULD BE ODD
+#define GRAPHENE_DEFAULT_MAX_SONS                             (15)
 #define GRAPHENE_DEFAULT_MAX_PROPOSAL_LIFETIME_SEC            (60*60*24*7*4) // Four weeks
 #define GRAPHENE_DEFAULT_COMMITTEE_PROPOSAL_REVIEW_PERIOD_SEC (60*60*24*7*2) // Two weeks
 #define GRAPHENE_DEFAULT_NETWORK_PERCENT_OF_FEE               (20*GRAPHENE_1_PERCENT)
@@ -173,6 +175,8 @@
 #define GRAPHENE_PROXY_TO_SELF_ACCOUNT (graphene::chain::account_id_type(5))
 ///
 #define GRAPHENE_RAKE_FEE_ACCOUNT_ID (graphene::chain::account_id_type(6))
+///
+#define GRAPHENE_SON_ACCOUNT_ID (graphene::chain::account_id_type(7))
 /// Sentinel value used in the scheduler.
 #define GRAPHENE_NULL_WITNESS (graphene::chain::witness_id_type(0))
 ///@}
@@ -227,8 +231,6 @@
 #define TOURNAMENT_MAX_WHITELIST_LENGTH                     1000
 #define TOURNAMENT_MAX_START_TIME_IN_FUTURE                 (60*60*24*7*4) // 1 month
 #define TOURNAMENT_MAX_START_DELAY                          (60*60*24*7) // 1 week
-#define GPOS_PERIOD                                         (60*60*24*30*6) // 6 months
-#define GPOS_SUBPERIOD                                      (60*60*24*30) // 1 month
 #define MIN_SON_MEMBER_COUNT                                15
 
 #define SWEEPS_DEFAULT_DISTRIBUTION_PERCENTAGE              (2*GRAPHENE_1_PERCENT)
diff --git a/libraries/chain/include/graphene/chain/database.hpp b/libraries/chain/include/graphene/chain/database.hpp
index 483bfc8a8..9fe285b42 100644
--- a/libraries/chain/include/graphene/chain/database.hpp
+++ b/libraries/chain/include/graphene/chain/database.hpp
@@ -519,6 +519,7 @@ namespace graphene { namespace chain {
          void perform_chain_maintenance(const signed_block& next_block, const global_property_object& global_props);
          void update_active_witnesses();
          void update_active_committee_members();
+         void update_active_sons();
          void update_worker_votes();
       
          template<class... Types>
@@ -556,6 +557,7 @@ namespace graphene { namespace chain {
          vector<uint64_t>                  _vote_tally_buffer;
          vector<uint64_t>                  _witness_count_histogram_buffer;
          vector<uint64_t>                  _committee_count_histogram_buffer;
+         vector<uint64_t>                  _son_count_histogram_buffer;
          uint64_t                          _total_voting_stake;
 
          flat_map<uint32_t,block_id_type>  _checkpoints;
diff --git a/libraries/chain/include/graphene/chain/global_property_object.hpp b/libraries/chain/include/graphene/chain/global_property_object.hpp
index 77f85df68..788ccdafd 100644
--- a/libraries/chain/include/graphene/chain/global_property_object.hpp
+++ b/libraries/chain/include/graphene/chain/global_property_object.hpp
@@ -52,6 +52,8 @@ namespace graphene { namespace chain {
          vector<committee_member_id_type>   active_committee_members; // updated once per maintenance interval
          flat_set<witness_id_type>          active_witnesses; // updated once per maintenance interval
          // n.b. witness scheduling is done by witness_schedule object
+
+         flat_set<son_id_type>              active_sons; // updated once per maintenance interval
    };
 
    /**
@@ -148,4 +150,5 @@ FC_REFLECT_DERIVED( graphene::chain::global_property_object, (graphene::db::obje
                     (next_available_vote_id)
                     (active_committee_members)
                     (active_witnesses)
+                    (active_sons)
                   )
diff --git a/libraries/chain/include/graphene/chain/immutable_chain_parameters.hpp b/libraries/chain/include/graphene/chain/immutable_chain_parameters.hpp
index 0082383c9..ade1a459a 100644
--- a/libraries/chain/include/graphene/chain/immutable_chain_parameters.hpp
+++ b/libraries/chain/include/graphene/chain/immutable_chain_parameters.hpp
@@ -35,6 +35,7 @@ struct immutable_chain_parameters
 {
    uint16_t min_committee_member_count = GRAPHENE_DEFAULT_MIN_COMMITTEE_MEMBER_COUNT;
    uint16_t min_witness_count = GRAPHENE_DEFAULT_MIN_WITNESS_COUNT;
+   uint16_t min_son_count = GRAPHENE_DEFAULT_MIN_SON_COUNT;
    uint32_t num_special_accounts = 0;
    uint32_t num_special_assets = 0;
 };
@@ -44,6 +45,7 @@ struct immutable_chain_parameters
 FC_REFLECT( graphene::chain::immutable_chain_parameters,
    (min_committee_member_count)
    (min_witness_count)
+   (min_son_count)
    (num_special_accounts)
    (num_special_assets)
 )
diff --git a/libraries/chain/include/graphene/chain/protocol/account.hpp b/libraries/chain/include/graphene/chain/protocol/account.hpp
index 6d13a4d3e..496e9067b 100644
--- a/libraries/chain/include/graphene/chain/protocol/account.hpp
+++ b/libraries/chain/include/graphene/chain/protocol/account.hpp
@@ -52,6 +52,9 @@ namespace graphene { namespace chain {
       /// The number of active committee members this account votes the blockchain should appoint
       /// Must not exceed the actual number of committee members voted for in @ref votes
       uint16_t num_committee = 0;
+      /// The number of active son members this account votes the blockchain should appoint
+      /// Must not exceed the actual number of son members voted for in @ref votes
+      uint16_t num_son = 0;
       /// This is the list of vote IDs this account votes for. The weight of these votes is determined by this
       /// account's balance of core asset.
       flat_set<vote_id_type> votes;
diff --git a/libraries/chain/include/graphene/chain/protocol/chain_parameters.hpp b/libraries/chain/include/graphene/chain/protocol/chain_parameters.hpp
index 90bf70885..2cfedb953 100644
--- a/libraries/chain/include/graphene/chain/protocol/chain_parameters.hpp
+++ b/libraries/chain/include/graphene/chain/protocol/chain_parameters.hpp
@@ -37,10 +37,6 @@ namespace graphene { namespace chain {
       optional< uint16_t >            betting_rake_fee_percentage;
       optional< flat_map<bet_multiplier_type, bet_multiplier_type> > permitted_betting_odds_increments;
       optional< uint16_t >            live_betting_delay_time;
-      /* gpos parameters */
-      optional < uint32_t >           gpos_period;
-      optional < uint32_t >           gpos_subperiod;
-      optional < uint32_t >           gpos_period_start;
       optional < uint16_t >           son_count;
       optional< uint16_t >            sweeps_distribution_percentage;
       optional< asset_id_type >       sweeps_distribution_asset;
@@ -63,6 +59,7 @@ namespace graphene { namespace chain {
       uint8_t                 maximum_asset_feed_publishers       = GRAPHENE_DEFAULT_MAX_ASSET_FEED_PUBLISHERS; ///< the maximum number of feed publishers for a given asset
       uint16_t                maximum_witness_count               = GRAPHENE_DEFAULT_MAX_WITNESSES; ///< maximum number of active witnesses
       uint16_t                maximum_committee_count             = GRAPHENE_DEFAULT_MAX_COMMITTEE; ///< maximum number of active committee_members
+      uint16_t                maximum_son_count                   = GRAPHENE_DEFAULT_MAX_SONS; ///< maximum number of active SONS
       uint16_t                maximum_authority_membership        = GRAPHENE_DEFAULT_MAX_AUTHORITY_MEMBERSHIP; ///< largest number of keys/accounts an authority can have
       uint16_t                reserve_percent_of_fee              = GRAPHENE_DEFAULT_BURN_PERCENT_OF_FEE; ///< the percentage of the network's allocation of a fee that is taken out of circulation
       uint16_t                network_percent_of_fee              = GRAPHENE_DEFAULT_NETWORK_PERCENT_OF_FEE; ///< percent of transaction fees paid to network
@@ -137,9 +134,6 @@ FC_REFLECT( graphene::chain::parameter_extension,
    (betting_rake_fee_percentage)
    (permitted_betting_odds_increments)
    (live_betting_delay_time)
-   (gpos_period)
-   (gpos_subperiod)
-   (gpos_period_start)
    (son_count)
    (sweeps_distribution_percentage)
    (sweeps_distribution_asset)
@@ -160,6 +154,7 @@ FC_REFLECT( graphene::chain::chain_parameters,
             (maximum_asset_feed_publishers)
             (maximum_witness_count)
             (maximum_committee_count)
+            (maximum_son_count)
             (maximum_authority_membership)
             (reserve_percent_of_fee)
             (network_percent_of_fee)
diff --git a/libraries/chain/include/graphene/chain/protocol/operations.hpp b/libraries/chain/include/graphene/chain/protocol/operations.hpp
index bce0e201e..cbad1e05e 100644
--- a/libraries/chain/include/graphene/chain/protocol/operations.hpp
+++ b/libraries/chain/include/graphene/chain/protocol/operations.hpp
@@ -45,6 +45,7 @@
 #include <graphene/chain/protocol/event.hpp>
 #include <graphene/chain/protocol/betting_market.hpp>
 #include <graphene/chain/protocol/tournament.hpp>
+#include <graphene/chain/protocol/son.hpp>
 
 namespace graphene { namespace chain {
 
@@ -135,7 +136,10 @@ namespace graphene { namespace chain {
             ticket_purchase_operation,
             lottery_reward_operation,
             lottery_end_operation,
-            sweeps_vesting_claim_operation
+            sweeps_vesting_claim_operation,
+            son_create_operation,
+            son_update_operation,
+            son_delete_operation
          > operation;
 
    /// @} // operations group
diff --git a/libraries/chain/include/graphene/chain/protocol/son.hpp b/libraries/chain/include/graphene/chain/protocol/son.hpp
new file mode 100644
index 000000000..efea3ef73
--- /dev/null
+++ b/libraries/chain/include/graphene/chain/protocol/son.hpp
@@ -0,0 +1,60 @@
+#pragma once
+#include <graphene/chain/protocol/base.hpp>
+
+namespace graphene { namespace chain {
+
+    struct son_create_operation : public base_operation
+    {
+        struct fee_parameters_type { uint64_t fee = 0; };
+
+        asset fee;
+        account_id_type owner_account;
+        std::string url;
+        vesting_balance_id_type deposit;
+        public_key_type signing_key;
+        vesting_balance_id_type pay_vb;
+
+        account_id_type fee_payer()const { return owner_account; }
+        share_type      calculate_fee(const fee_parameters_type& k)const { return 0; }
+    };
+
+    struct son_update_operation : public base_operation
+    {
+         struct fee_parameters_type { uint64_t fee = 0; };
+
+         asset fee;
+         son_id_type son_id;
+         account_id_type owner_account;
+         optional<std::string> new_url;
+         optional<vesting_balance_id_type> new_deposit;
+         optional<public_key_type> new_signing_key;
+         optional<vesting_balance_id_type> new_pay_vb;
+
+         account_id_type fee_payer()const { return owner_account; }
+         share_type      calculate_fee(const fee_parameters_type& k)const { return 0; }
+    };
+
+    struct son_delete_operation : public base_operation
+    {
+        struct fee_parameters_type { uint64_t fee = 0; };
+
+        asset fee;
+        son_id_type son_id;
+        account_id_type owner_account;
+
+        account_id_type fee_payer()const { return owner_account; }
+        share_type      calculate_fee(const fee_parameters_type& k)const { return 0; }
+    };
+
+} } // namespace graphene::chain
+
+FC_REFLECT(graphene::chain::son_create_operation::fee_parameters_type, (fee) )
+FC_REFLECT(graphene::chain::son_create_operation, (fee)(owner_account)(url)(deposit)(signing_key)
+           (pay_vb) )
+
+FC_REFLECT(graphene::chain::son_update_operation::fee_parameters_type, (fee) )
+FC_REFLECT(graphene::chain::son_update_operation, (fee)(son_id)(owner_account)(new_url)(new_deposit)
+           (new_signing_key)(new_pay_vb) )
+
+FC_REFLECT(graphene::chain::son_delete_operation::fee_parameters_type, (fee) )
+FC_REFLECT(graphene::chain::son_delete_operation, (fee)(son_id)(owner_account) )
diff --git a/libraries/chain/include/graphene/chain/protocol/types.hpp b/libraries/chain/include/graphene/chain/protocol/types.hpp
index c2c92ca31..707f92743 100644
--- a/libraries/chain/include/graphene/chain/protocol/types.hpp
+++ b/libraries/chain/include/graphene/chain/protocol/types.hpp
@@ -145,6 +145,7 @@ namespace graphene { namespace chain {
       betting_market_group_object_type,
       betting_market_object_type,
       bet_object_type,
+      son_object_type,
       OBJECT_TYPE_COUNT ///< Sentry value which contains the number of different object types
    };
 
@@ -204,6 +205,7 @@ namespace graphene { namespace chain {
    class betting_market_group_object;
    class betting_market_object;
    class bet_object;
+   class son_object;
 
    typedef object_id< protocol_ids, account_object_type,            account_object>               account_id_type;
    typedef object_id< protocol_ids, asset_object_type,              asset_object>                 asset_id_type;
@@ -230,6 +232,7 @@ namespace graphene { namespace chain {
    typedef object_id< protocol_ids, betting_market_group_object_type, betting_market_group_object> betting_market_group_id_type;
    typedef object_id< protocol_ids, betting_market_object_type,     betting_market_object>        betting_market_id_type;
    typedef object_id< protocol_ids, bet_object_type,                bet_object>                   bet_id_type;
+   typedef object_id< protocol_ids, son_object_type,                son_object>                   son_id_type;
 
    // implementation types
    class global_property_object;
@@ -410,6 +413,7 @@ FC_REFLECT_ENUM( graphene::chain::object_type,
                  (betting_market_group_object_type)
                  (betting_market_object_type)
                  (bet_object_type)
+                 (son_object_type)
                  (OBJECT_TYPE_COUNT)
                )
 FC_REFLECT_ENUM( graphene::chain::impl_object_type,
@@ -479,6 +483,8 @@ FC_REFLECT_TYPENAME( graphene::chain::fba_accumulator_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::betting_market_position_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::global_betting_statistics_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::tournament_details_id_type )
+FC_REFLECT_TYPENAME( graphene::chain::son_id_type )
+
 
 FC_REFLECT( graphene::chain::void_t, )
 
diff --git a/libraries/chain/include/graphene/chain/protocol/vote.hpp b/libraries/chain/include/graphene/chain/protocol/vote.hpp
index 67536f7a3..7ef2c8a14 100644
--- a/libraries/chain/include/graphene/chain/protocol/vote.hpp
+++ b/libraries/chain/include/graphene/chain/protocol/vote.hpp
@@ -64,6 +64,7 @@ struct vote_id_type
       committee,
       witness,
       worker,
+      son,
       VOTE_TYPE_COUNT
    };
 
@@ -148,5 +149,5 @@ void from_variant( const fc::variant& var, graphene::chain::vote_id_type& vo, ui
 
 FC_REFLECT_TYPENAME( fc::flat_set<graphene::chain::vote_id_type> )
 
-FC_REFLECT_ENUM( graphene::chain::vote_id_type::vote_type, (witness)(committee)(worker)(VOTE_TYPE_COUNT) )
+FC_REFLECT_ENUM( graphene::chain::vote_id_type::vote_type, (witness)(committee)(worker)(son)(VOTE_TYPE_COUNT) )
 FC_REFLECT( graphene::chain::vote_id_type, (content) )
diff --git a/libraries/chain/include/graphene/chain/son_evaluator.hpp b/libraries/chain/include/graphene/chain/son_evaluator.hpp
new file mode 100644
index 000000000..bb6a1820c
--- /dev/null
+++ b/libraries/chain/include/graphene/chain/son_evaluator.hpp
@@ -0,0 +1,34 @@
+#pragma once
+#include <graphene/chain/evaluator.hpp>
+#include <graphene/chain/protocol/son.hpp>
+
+namespace graphene { namespace chain {
+
+class create_son_evaluator : public evaluator<create_son_evaluator>
+{
+public:
+    typedef son_create_operation operation_type;
+
+    void_result do_evaluate(const son_create_operation& o);
+    object_id_type do_apply(const son_create_operation& o);
+};
+
+class update_son_evaluator : public evaluator<update_son_evaluator>
+{
+public:
+    typedef son_update_operation operation_type;
+
+    void_result do_evaluate(const son_update_operation& o);
+    object_id_type do_apply(const son_update_operation& o);
+};
+
+class delete_son_evaluator : public evaluator<delete_son_evaluator>
+{
+public:
+    typedef son_delete_operation operation_type;
+
+    void_result do_evaluate(const son_delete_operation& o);
+    void_result do_apply(const son_delete_operation& o);
+};
+
+} } // namespace graphene::chain
diff --git a/libraries/chain/include/graphene/chain/son_object.hpp b/libraries/chain/include/graphene/chain/son_object.hpp
new file mode 100644
index 000000000..ba84fadb7
--- /dev/null
+++ b/libraries/chain/include/graphene/chain/son_object.hpp
@@ -0,0 +1,49 @@
+#pragma once
+#include <graphene/chain/protocol/types.hpp>
+#include <graphene/db/object.hpp>
+#include <graphene/db/generic_index.hpp>
+
+namespace graphene { namespace chain {
+   using namespace graphene::db;
+
+   /**
+    * @class son_object
+    * @brief tracks information about a SON account.
+    * @ingroup object
+    */
+   class son_object : public abstract_object<son_object>
+   {
+      public:
+         static const uint8_t space_id = protocol_ids;
+         static const uint8_t type_id  = son_object_type;
+
+         account_id_type son_account;
+         vote_id_type vote_id;
+         uint64_t total_votes = 0;
+         string url;
+         vesting_balance_id_type deposit;
+         public_key_type signing_key;
+         vesting_balance_id_type pay_vb;
+   };
+
+   struct by_account;
+   struct by_vote_id;
+   using son_multi_index_type = multi_index_container<
+      son_object,
+      indexed_by<
+         ordered_unique< tag<by_id>,
+            member<object, object_id_type, &object::id>
+         >,
+         ordered_unique< tag<by_account>,
+            member<son_object, account_id_type, &son_object::son_account>
+         >,
+         ordered_unique< tag<by_vote_id>,
+            member<son_object, vote_id_type, &son_object::vote_id>
+         >
+      >
+   >;
+   using son_index = generic_index<son_object, son_multi_index_type>;
+} } // graphene::chain
+
+FC_REFLECT_DERIVED( graphene::chain::son_object, (graphene::db::object),
+                    (son_account)(vote_id)(total_votes)(url)(deposit)(signing_key)(pay_vb) )
diff --git a/libraries/chain/proposal_evaluator.cpp b/libraries/chain/proposal_evaluator.cpp
index 3a44ca5cb..245e1a53f 100644
--- a/libraries/chain/proposal_evaluator.cpp
+++ b/libraries/chain/proposal_evaluator.cpp
@@ -135,6 +135,18 @@ struct proposal_operation_hardfork_visitor
        FC_ASSERT( block_time >= HARDFORK_1000_TIME, "event_update_status_operation not allowed yet!" );
    }
 
+   void operator()(const son_create_operation &v) const {
+      FC_ASSERT( block_time >= HARDFORK_SON_TIME, "son_create_operation not allowed yet!" );
+   }
+
+   void operator()(const son_update_operation &v) const {
+      FC_ASSERT( block_time >= HARDFORK_SON_TIME, "son_update_operation not allowed yet!" );
+   }
+
+   void operator()(const son_delete_operation &v) const {
+      FC_ASSERT( block_time >= HARDFORK_SON_TIME, "son_delete_operation not allowed yet!" );
+   }
+
    // loop and self visit in proposals
    void operator()(const proposal_create_operation &v) const {
       for (const op_wrapper &op : v.proposed_ops)
diff --git a/libraries/chain/son_evaluator.cpp b/libraries/chain/son_evaluator.cpp
new file mode 100644
index 000000000..6d70dc624
--- /dev/null
+++ b/libraries/chain/son_evaluator.cpp
@@ -0,0 +1,75 @@
+#include <graphene/chain/son_evaluator.hpp>
+
+#include <graphene/chain/database.hpp>
+#include <graphene/chain/son_object.hpp>
+#include <graphene/chain/hardfork.hpp>
+
+namespace graphene { namespace chain {
+
+void_result create_son_evaluator::do_evaluate(const son_create_operation& op)
+{ try{
+   FC_ASSERT(db().head_block_time() >= HARDFORK_SON_TIME, "Not allowed until SON HARDFORK");
+   FC_ASSERT(db().get(op.owner_account).is_lifetime_member(), "Only Lifetime members may register a SON.");
+    return void_result();
+} FC_CAPTURE_AND_RETHROW( (op) ) }
+
+object_id_type create_son_evaluator::do_apply(const son_create_operation& op)
+{ try {
+    vote_id_type vote_id;
+    db().modify(db().get_global_properties(), [&vote_id](global_property_object& p) {
+        vote_id = get_next_vote_id(p, vote_id_type::son);
+    });
+
+    const auto& new_son_object = db().create<son_object>( [&]( son_object& obj ){
+        obj.son_account = op.owner_account;
+        obj.vote_id = vote_id;
+        obj.url = op.url;
+        obj.deposit = op.deposit;
+        obj.signing_key = op.signing_key;
+        obj.pay_vb = op.pay_vb;
+    });
+    return new_son_object.id;
+} FC_CAPTURE_AND_RETHROW( (op) ) }
+
+void_result update_son_evaluator::do_evaluate(const son_update_operation& op)
+{ try {
+    FC_ASSERT(db().head_block_time() >= HARDFORK_SON_TIME, "Not allowed until SON HARDFORK"); // can be removed after HF date pass
+    FC_ASSERT(db().get(op.son_id).son_account == op.owner_account);
+    const auto& idx = db().get_index_type<son_index>().indices().get<by_id>();
+    FC_ASSERT( idx.find(op.son_id) != idx.end() );
+    return void_result();
+} FC_CAPTURE_AND_RETHROW( (op) ) }
+
+object_id_type update_son_evaluator::do_apply(const son_update_operation& op)
+{ try {
+   const auto& idx = db().get_index_type<son_index>().indices().get<by_id>();
+   auto itr = idx.find(op.son_id);
+   if(itr != idx.end())
+   {
+       db().modify(*itr, [&op](son_object &so) {
+           if(op.new_url.valid()) so.url = *op.new_url;
+           if(op.new_deposit.valid()) so.deposit = *op.new_deposit;
+           if(op.new_signing_key.valid()) so.signing_key = *op.new_signing_key;
+           if(op.new_pay_vb.valid()) so.pay_vb = *op.new_pay_vb;
+       });
+   }
+   return op.son_id;
+} FC_CAPTURE_AND_RETHROW( (op) ) }
+
+void_result delete_son_evaluator::do_evaluate(const son_delete_operation& op)
+{ try {
+    FC_ASSERT(db().head_block_time() >= HARDFORK_SON_TIME, "Not allowed until SON_HARDFORK"); // can be removed after HF date pass
+    FC_ASSERT(db().get(op.son_id).son_account == op.owner_account);
+    const auto& idx = db().get_index_type<son_index>().indices().get<by_id>();
+    FC_ASSERT( idx.find(op.son_id) != idx.end() );
+    return void_result();
+} FC_CAPTURE_AND_RETHROW( (op) ) }
+
+void_result delete_son_evaluator::do_apply(const son_delete_operation& op)
+{ try {
+    const auto& idx = db().get_index_type<son_index>().indices().get<by_id>();
+    db().remove(*idx.find(op.son_id));
+    return void_result();
+} FC_CAPTURE_AND_RETHROW( (op) ) }
+
+} } // namespace graphene::chain
diff --git a/libraries/net/CMakeLists.txt b/libraries/net/CMakeLists.txt
index 7aa617d77..f7f549ed5 100644
--- a/libraries/net/CMakeLists.txt
+++ b/libraries/net/CMakeLists.txt
@@ -10,7 +10,7 @@ set(SOURCES node.cpp
 add_library( graphene_net ${SOURCES} ${HEADERS} )
 
 target_link_libraries( graphene_net 
-  PUBLIC fc graphene_db )
+  PUBLIC graphene_chain )
 target_include_directories( graphene_net 
   PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/include"
   PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/../chain/include" "${CMAKE_CURRENT_BINARY_DIR}/../chain/include"
diff --git a/libraries/plugins/peerplays_sidechain/CMakeLists.txt b/libraries/plugins/peerplays_sidechain/CMakeLists.txt
index 916487e3c..931d4f45a 100644
--- a/libraries/plugins/peerplays_sidechain/CMakeLists.txt
+++ b/libraries/plugins/peerplays_sidechain/CMakeLists.txt
@@ -1,4 +1,4 @@
-file(GLOB HEADERS "include/graphene/peerplays_sidechain_history/*.hpp")
+file(GLOB HEADERS "include/graphene/peerplays_sidechain/*.hpp")
 
 add_library( peerplays_sidechain
              peerplays_sidechain_plugin.cpp
diff --git a/libraries/wallet/include/graphene/wallet/wallet.hpp b/libraries/wallet/include/graphene/wallet/wallet.hpp
index 3059f1794..fd4a3c404 100644
--- a/libraries/wallet/include/graphene/wallet/wallet.hpp
+++ b/libraries/wallet/include/graphene/wallet/wallet.hpp
@@ -188,6 +188,7 @@ struct wallet_data
    //    incomplete account regs
    map<string, vector<string> > pending_account_registrations;
    map<string, string> pending_witness_registrations;
+   map<string, string> pending_son_registrations;
 
    key_label_index_type                                              labeled_keys;
    blind_receipt_index_type                                          blind_receipts;
@@ -1283,6 +1284,12 @@ class wallet_api
        */
       map<string, committee_member_id_type>       list_committee_members(const string& lowerbound, uint32_t limit);
 
+      /** Returns information about the given SON.
+       * @param owner_account the name or id of the SON account owner, or the id of the SON
+       * @returns the information about the SON stored in the block chain
+       */
+      son_object get_son(string owner_account);
+
       /** Returns information about the given witness.
        * @param owner_account the name or id of the witness account owner, or the id of the witness
        * @returns the information about the witness stored in the block chain
@@ -1295,6 +1302,63 @@ class wallet_api
        */
       committee_member_object get_committee_member(string owner_account);
 
+
+      /** Creates a SON object owned by the given account.
+       *
+       * An account can have at most one SON object.
+       *
+       * @param owner_account the name or id of the account which is creating the SON
+       * @param url a URL to include in the SON record in the blockchain.  Clients may
+       *            display this when showing a list of SONs.  May be blank.
+       * @param broadcast true to broadcast the transaction on the network
+       * @returns the signed transaction registering a SON
+       */
+      signed_transaction create_son(string owner_account,
+                                    string url,
+                                    bool broadcast = false);
+
+      /**
+       * Update a SON object owned by the given account.
+       *
+       * @param witness The name of the SON's owner account.  Also accepts the ID of the owner account or the ID of the SON.
+       * @param url Same as for create_son.  The empty string makes it remain the same.
+       * @param block_signing_key The new block signing public key.  The empty string makes it remain the same.
+       * @param broadcast true if you wish to broadcast the transaction.
+       */
+      signed_transaction update_son(string owner_account,
+                                    string url,
+                                    string block_signing_key,
+                                    bool broadcast = false);
+
+
+      /** Deletes a SON object owned by the given account.
+       *
+       * An account can have at most one witness object.
+       *
+       * @param owner_account the name or id of the account which is creating the witness
+       * @param url a URL to include in the witness record in the blockchain.  Clients may
+       *            display this when showing a list of witnesses.  May be blank.
+       * @param broadcast true to broadcast the transaction on the network
+       * @returns the signed transaction registering a witness
+       */
+      signed_transaction delete_son(string owner_account,
+                                    bool broadcast = false);
+
+      /** Lists all SONs in the blockchain.
+       * This returns a list of all account names that own SON, and the associated SON id,
+       * sorted by name.  This lists SONs whether they are currently voted in or not.
+       *
+       * Use the \c lowerbound and limit parameters to page through the list.  To retrieve all SONs,
+       * start by setting \c lowerbound to the empty string \c "", and then each iteration, pass
+       * the last SON name returned as the \c lowerbound for the next \c list_sons() call.
+       *
+       * @param lowerbound the name of the first SON to return.  If the named SON does not exist,
+       *                   the list will start at the SON that comes after \c lowerbound
+       * @param limit the maximum number of SON to return (max: 1000)
+       * @returns a list of SON mapping SON names to SON ids
+       */
+      map<string, son_id_type> list_sons(const string& lowerbound, uint32_t limit);
+
       /** Creates a witness object owned by the given account.
        *
        * An account can have at most one witness object.
@@ -1402,6 +1466,61 @@ class wallet_api
                                            bool approve,
                                            bool broadcast = false);
 
+      /** Vote for a given SON.
+       *
+       * An account can publish a list of all SONs they approve of.  This
+       * command allows you to add or remove SONs from this list.
+       * Each account's vote is weighted according to the number of shares of the
+       * core asset owned by that account at the time the votes are tallied.
+       *
+       * @note you cannot vote against a SON, you can only vote for the SON
+       *       or not vote for the SON.
+       *
+       * @param voting_account the name or id of the account who is voting with their shares
+       * @param son the name or id of the SONs' owner account
+       * @param approve true if you wish to vote in favor of that SON, false to
+       *                remove your vote in favor of that SON
+       * @param broadcast true if you wish to broadcast the transaction
+       * @return the signed transaction changing your vote for the given SON
+       */
+      signed_transaction vote_for_son(string voting_account,
+                                             string son,
+                                             bool approve,
+                                             bool broadcast = false);
+
+      /** Change your SON votes.
+       *
+       * An account can publish a list of all SONs they approve of.
+       * Each account's vote is weighted according to the number of shares of the
+       * core asset owned by that account at the time the votes are tallied.
+       * This command allows you to add or remove one or more SON from this list
+       * in one call.  When you are changing your vote on several SONs, this
+       * may be easier than multiple `vote_for_sons` and
+       * `set_desired_witness_and_committee_member_count` calls.
+       *
+       * @note you cannot vote against a SON, you can only vote for the SON
+       *       or not vote for the SON.
+       *
+       * @param voting_account the name or id of the account who is voting with their shares
+       * @param sons_to_approve the names or ids of the sons owner accounts you wish
+       *                             to approve (these will be added to the list of sons
+       *                             you currently approve).  This list can be empty.
+       * @param sons_to_reject the names or ids of the SONs owner accounts you wish
+       *                            to reject (these will be removed from the list of SONs
+       *                            you currently approve).  This list can be empty.
+       * @param desired_number_of_sons the number of SONs you believe the network
+       *                                    should have.  You must vote for at least this many
+       *                                    SONs.  You can set this to 0 to abstain from
+       *                                    voting on the number of SONNs.
+       * @param broadcast true if you wish to broadcast the transaction
+       * @return the signed transaction changing your vote for the given witnesses
+       */
+      signed_transaction update_son_votes(string voting_account,
+                                              std::vector<std::string> sons_to_approve,
+                                              std::vector<std::string> sons_to_reject,
+                                              uint16_t desired_number_of_son,
+                                              bool broadcast = false);
+
       /** Vote for a given witness.
        *
        * An account can publish a list of all witnesses they approve of.  This 
@@ -1863,7 +1982,7 @@ FC_REFLECT( graphene::wallet::wallet_data,
             (my_accounts)
             (cipher_keys)
             (extra_keys)
-            (pending_account_registrations)(pending_witness_registrations)
+            (pending_account_registrations)(pending_witness_registrations)(pending_son_registrations)
             (labeled_keys)
             (blind_receipts)
             (committed_game_moves)
@@ -1969,10 +2088,15 @@ FC_API( graphene::wallet::wallet_api,
         (settle_asset)
         (whitelist_account)
         (create_committee_member)
+        (get_son)
         (get_witness)
         (get_committee_member)
         (list_witnesses)
         (list_committee_members)
+        (create_son)
+        (update_son)
+        (delete_son)
+        (list_sons)
         (create_witness)
         (update_witness)
         (create_worker)
@@ -1980,6 +2104,8 @@ FC_API( graphene::wallet::wallet_api,
         (get_vesting_balances)
         (withdraw_vesting)
         (vote_for_committee_member)
+        (vote_for_son)
+        (update_son_votes)
         (vote_for_witness)
         (update_witness_votes)
         (set_voting_proxy)
diff --git a/libraries/wallet/wallet.cpp b/libraries/wallet/wallet.cpp
index 5d5345369..7d6b9ef7f 100644
--- a/libraries/wallet/wallet.cpp
+++ b/libraries/wallet/wallet.cpp
@@ -293,6 +293,23 @@ class wallet_api_impl
       _wallet.pending_account_registrations.erase( it );
    }
 
+   // after a son registration succeeds, this saves the private key in the wallet permanently
+   //
+   void claim_registered_son(const std::string& son_name)
+   {
+      auto iter = _wallet.pending_son_registrations.find(son_name);
+      FC_ASSERT(iter != _wallet.pending_son_registrations.end());
+      std::string wif_key = iter->second;
+
+      // get the list key id this key is registered with in the chain
+      fc::optional<fc::ecc::private_key> son_private_key = wif_to_key(wif_key);
+      FC_ASSERT(son_private_key);
+
+      auto pub_key = son_private_key->get_public_key();
+      _keys[pub_key] = wif_key;
+      _wallet.pending_son_registrations.erase(iter);
+   }
+
    // after a witness registration succeeds, this saves the private key in the wallet permanently
    //
    void claim_registered_witness(const std::string& witness_name)
@@ -354,6 +371,24 @@ class wallet_api_impl
                   claim_registered_witness(optional_account->name);
             }
       }
+
+      if (!_wallet.pending_son_registrations.empty())
+      {
+         // make a vector of the owner accounts for sons pending registration
+         std::vector<string> pending_son_names = boost::copy_range<std::vector<string> >(boost::adaptors::keys(_wallet.pending_son_registrations));
+
+         // look up the owners on the blockchain
+         std::vector<fc::optional<graphene::chain::account_object>> owner_account_objects = _remote_db->lookup_account_names(pending_son_names);
+
+         // if any of them have registered sons, claim them
+         for( const fc::optional<graphene::chain::account_object>& optional_account : owner_account_objects )
+            if (optional_account)
+            {
+               fc::optional<son_object> son_obj = _remote_db->get_son_by_account(optional_account->id);
+               if (son_obj)
+                  claim_registered_son(optional_account->name);
+            }
+      }
    }
 
    // return true if any of my_accounts are players in this tournament
@@ -666,6 +701,7 @@ class wallet_api_impl
       result["participation"] = (100*dynamic_props.recent_slots_filled.popcount()) / 128.0;
       result["active_witnesses"] = fc::variant(global_props.active_witnesses, GRAPHENE_MAX_NESTED_OBJECTS);
       result["active_committee_members"] = fc::variant(global_props.active_committee_members, GRAPHENE_MAX_NESTED_OBJECTS);
+      result["active_sons"] = fc::variant(global_props.active_sons, GRAPHENE_MAX_NESTED_OBJECTS);
       result["entropy"] = fc::variant(dynamic_props.random, GRAPHENE_MAX_NESTED_OBJECTS);
       return result;
    }
@@ -1752,6 +1788,41 @@ class wallet_api_impl
       FC_CAPTURE_AND_RETHROW( (owner_account) )
    }
 
+   son_object get_son(string owner_account)
+   {
+      try
+      {
+         fc::optional<son_id_type> son_id = maybe_id<son_id_type>(owner_account);
+         if (son_id)
+         {
+            std::vector<son_id_type> ids_to_get;
+            ids_to_get.push_back(*son_id);
+            std::vector<fc::optional<son_object>> son_objects = _remote_db->get_sons(ids_to_get);
+            if (son_objects.front())
+               return *son_objects.front();
+            FC_THROW("No SON is registered for id ${id}", ("id", owner_account));
+         }
+         else
+         {
+            // then maybe it's the owner account
+            try
+            {
+               account_id_type owner_account_id = get_account_id(owner_account);
+               fc::optional<son_object> son = _remote_db->get_son_by_account(owner_account_id);
+               if (son)
+                  return *son;
+               else
+                  FC_THROW("No SON is registered for account ${account}", ("account", owner_account));
+            }
+            catch (const fc::exception&)
+            {
+               FC_THROW("No account or SON named ${account}", ("account", owner_account));
+            }
+         }
+      }
+      FC_CAPTURE_AND_RETHROW( (owner_account) )
+   }
+
    committee_member_object get_committee_member(string owner_account)
    {
       try
@@ -1787,6 +1858,82 @@ class wallet_api_impl
       FC_CAPTURE_AND_RETHROW( (owner_account) )
    }
 
+   signed_transaction create_son(string owner_account,
+                                 string url,
+                                 bool broadcast /* = false */)
+   { try {
+      account_object son_account = get_account(owner_account);
+      fc::ecc::private_key active_private_key = get_private_key_for_account(son_account);
+      int son_key_index = find_first_unused_derived_key_index(active_private_key);
+      fc::ecc::private_key son_private_key = derive_private_key(key_to_wif(active_private_key), son_key_index);
+      graphene::chain::public_key_type son_public_key = son_private_key.get_public_key();
+
+      son_create_operation son_create_op;
+      son_create_op.owner_account = son_account.id;
+      son_create_op.signing_key = son_public_key;
+      son_create_op.url = url;
+      secret_hash_type::encoder enc;
+      fc::raw::pack(enc, son_private_key);
+      fc::raw::pack(enc, secret_hash_type());
+
+      if (_remote_db->get_son_by_account(son_create_op.owner_account))
+         FC_THROW("Account ${owner_account} is already a SON", ("owner_account", owner_account));
+
+      signed_transaction tx;
+      tx.operations.push_back( son_create_op );
+      set_operation_fees( tx, _remote_db->get_global_properties().parameters.current_fees);
+      tx.validate();
+
+      _wallet.pending_son_registrations[owner_account] = key_to_wif(son_private_key);
+
+      return sign_transaction( tx, broadcast );
+   } FC_CAPTURE_AND_RETHROW( (owner_account)(broadcast) ) }
+
+   signed_transaction update_son(string owner_account,
+                                 string url,
+                                 string block_signing_key,
+                                 bool broadcast /* = false */)
+   { try {
+      son_object son = get_son(owner_account);
+      account_object son_account = get_account( son.son_account );
+      fc::ecc::private_key active_private_key = get_private_key_for_account(son_account);
+
+      son_update_operation son_update_op;
+      son_update_op.son_id = son.id;
+      son_update_op.owner_account = son_account.id;
+      if( url != "" )
+         son_update_op.new_url = url;
+      if( block_signing_key != "" ) {
+         son_update_op.new_signing_key = public_key_type( block_signing_key );
+      }
+
+      signed_transaction tx;
+      tx.operations.push_back( son_update_op );
+      set_operation_fees( tx, _remote_db->get_global_properties().parameters.current_fees );
+      tx.validate();
+
+      return sign_transaction( tx, broadcast );
+   } FC_CAPTURE_AND_RETHROW( (owner_account)(url)(block_signing_key)(broadcast) ) }
+
+   signed_transaction delete_son(string owner_account,
+                                 bool broadcast /* = false */)
+   { try {
+      son_object son = get_son(owner_account);
+      account_object son_account = get_account( son.son_account );
+      fc::ecc::private_key active_private_key = get_private_key_for_account(son_account);
+
+      son_delete_operation son_delete_op;
+      son_delete_op.son_id = son.id;
+      son_delete_op.owner_account = son_account.id;
+
+      signed_transaction tx;
+      tx.operations.push_back( son_delete_op );
+      set_operation_fees( tx, _remote_db->get_global_properties().parameters.current_fees );
+      tx.validate();
+
+      return sign_transaction( tx, broadcast );
+   } FC_CAPTURE_AND_RETHROW( (owner_account)(broadcast) ) }
+
    signed_transaction create_witness(string owner_account,
                                      string url,
                                      bool broadcast /* = false */)
@@ -2055,6 +2202,81 @@ class wallet_api_impl
       return sign_transaction( tx, broadcast );
    } FC_CAPTURE_AND_RETHROW( (voting_account)(committee_member)(approve)(broadcast) ) }
 
+   signed_transaction vote_for_son(string voting_account,
+                                        string son,
+                                        bool approve,
+                                        bool broadcast /* = false */)
+   { try {
+      account_object voting_account_object = get_account(voting_account);
+      account_id_type son_account_id = get_account_id(son);
+      fc::optional<son_object> son_obj = _remote_db->get_son_by_account(son_account_id);
+      if (!son_obj)
+         FC_THROW("Account ${son} is not registered as a son", ("son", son));
+      if (approve)
+      {
+         auto insert_result = voting_account_object.options.votes.insert(son_obj->vote_id);
+         if (!insert_result.second)
+            FC_THROW("Account ${account} was already voting for son ${son}", ("account", voting_account)("son", son));
+      }
+      else
+      {
+         unsigned votes_removed = voting_account_object.options.votes.erase(son_obj->vote_id);
+         if (!votes_removed)
+            FC_THROW("Account ${account} is already not voting for son ${son}", ("account", voting_account)("son", son));
+      }
+      account_update_operation account_update_op;
+      account_update_op.account = voting_account_object.id;
+      account_update_op.new_options = voting_account_object.options;
+
+      signed_transaction tx;
+      tx.operations.push_back( account_update_op );
+      set_operation_fees( tx, _remote_db->get_global_properties().parameters.current_fees);
+      tx.validate();
+
+      return sign_transaction( tx, broadcast );
+   } FC_CAPTURE_AND_RETHROW( (voting_account)(son)(approve)(broadcast) ) }
+
+   signed_transaction update_son_votes(string voting_account,
+                                           std::vector<std::string> sons_to_approve,
+                                           std::vector<std::string> sons_to_reject,
+                                           uint16_t desired_number_of_sons,
+                                           bool broadcast /* = false */)
+   { try {
+      account_object voting_account_object = get_account(voting_account);
+      for (const std::string& son : sons_to_approve)
+      {
+         account_id_type son_owner_account_id = get_account_id(son);
+         fc::optional<son_object> son_obj = _remote_db->get_son_by_account(son_owner_account_id);
+         if (!son_obj)
+            FC_THROW("Account ${son} is not registered as a witness", ("son", son));
+         auto insert_result = voting_account_object.options.votes.insert(son_obj->vote_id);
+         if (!insert_result.second)
+            FC_THROW("Account ${account} was already voting for son ${son}", ("account", voting_account)("son", son));
+      }
+      for (const std::string& son : sons_to_reject)
+      {
+         account_id_type son_owner_account_id = get_account_id(son);
+         fc::optional<son_object> son_obj = _remote_db->get_son_by_account(son_owner_account_id);
+         if (!son_obj)
+            FC_THROW("Account ${son} is not registered as a son", ("son", son));
+         unsigned votes_removed = voting_account_object.options.votes.erase(son_obj->vote_id);
+         if (!votes_removed)
+            FC_THROW("Account ${account} is already not voting for son ${son}", ("account", voting_account)("son", son));
+      }
+      voting_account_object.options.num_son = desired_number_of_sons;
+
+      account_update_operation account_update_op;
+      account_update_op.account = voting_account_object.id;
+      account_update_op.new_options = voting_account_object.options;
+
+      signed_transaction tx;
+      tx.operations.push_back( account_update_op );
+      set_operation_fees( tx, _remote_db->get_global_properties().parameters.current_fees);
+      tx.validate();
+
+      return sign_transaction( tx, broadcast );
+   } FC_CAPTURE_AND_RETHROW( (voting_account)(sons_to_approve)(sons_to_reject)(desired_number_of_sons)(broadcast) ) }
+
    signed_transaction vote_for_witness(string voting_account,
                                        string witness,
                                        bool approve,
@@ -4004,6 +4226,11 @@ map<string,committee_member_id_type> wallet_api::list_committee_members(const st
    return my->_remote_db->lookup_committee_member_accounts(lowerbound, limit);
 }
 
+son_object wallet_api::get_son(string owner_account)
+{
+   return my->get_son(owner_account);
+}
+
 witness_object wallet_api::get_witness(string owner_account)
 {
    return my->get_witness(owner_account);
@@ -4014,6 +4241,32 @@ committee_member_object wallet_api::get_committee_member(string owner_account)
    return my->get_committee_member(owner_account);
 }
 
+signed_transaction wallet_api::create_son(string owner_account,
+                                          string url,
+                                          bool broadcast /* = false */)
+{
+   return my->create_son(owner_account, url, broadcast);
+}
+
+signed_transaction wallet_api::update_son(string owner_account,
+                                          string url,
+                                          string block_signing_key,
+                                          bool broadcast /* = false */)
+{
+   return my->update_son(owner_account, url, block_signing_key, broadcast);
+}
+
+signed_transaction wallet_api::delete_son(string owner_account,
+                                          bool broadcast /* = false */)
+{
+   my->delete_son(owner_account, broadcast);
+}
+
+map<string, son_id_type> wallet_api::list_sons(const string& lowerbound, uint32_t limit)
+{
+   my->_remote_db->lookup_son_accounts(lowerbound, limit);
+}
+
 signed_transaction wallet_api::create_witness(string owner_account,
                                               string url,
                                               bool broadcast /* = false */)
@@ -4074,6 +4327,23 @@ signed_transaction wallet_api::vote_for_committee_member(string voting_account,
    return my->vote_for_committee_member(voting_account, witness, approve, broadcast);
 }
 
+signed_transaction wallet_api::vote_for_son(string voting_account,
+                                                   string son,
+                                                   bool approve,
+                                                   bool broadcast /* = false */)
+{
+   return my->vote_for_son(voting_account, son, approve, broadcast);
+}
+
+signed_transaction wallet_api::update_son_votes(string voting_account,
+                                                    std::vector<std::string> sons_to_approve,
+                                                    std::vector<std::string> sons_to_reject,
+                                                    uint16_t desired_number_of_sons,
+                                                    bool broadcast /* = false */)
+{
+   return my->update_son_votes(voting_account, sons_to_approve, sons_to_reject, desired_number_of_sons, broadcast);
+}
+
 signed_transaction wallet_api::vote_for_witness(string voting_account,
                                                 string witness,
                                                 bool approve,
diff --git a/programs/js_operation_serializer/main.cpp b/programs/js_operation_serializer/main.cpp
index 8994b36b5..a921c0c30 100644
--- a/programs/js_operation_serializer/main.cpp
+++ b/programs/js_operation_serializer/main.cpp
@@ -43,6 +43,7 @@
 #include <graphene/chain/tournament_object.hpp>
 #include <graphene/chain/match_object.hpp>
 #include <graphene/chain/game_object.hpp>
+#include <graphene/chain/son_object.hpp>
 
 #include <fc/smart_ref_impl.hpp>
 #include <iostream>
diff --git a/tests/cli/main.cpp b/tests/cli/main.cpp
index ee59f40f0..4aa73a97b 100644
--- a/tests/cli/main.cpp
+++ b/tests/cli/main.cpp
@@ -479,4 +479,4 @@ BOOST_FIXTURE_TEST_CASE( account_history_pagination, cli_fixture )
       edump((e.to_detail_string()));
       throw;
    }
-}
\ No newline at end of file
+}
diff --git a/tests/tests/son_operations_tests.cpp b/tests/tests/son_operations_tests.cpp
new file mode 100644
index 000000000..db9925445
--- /dev/null
+++ b/tests/tests/son_operations_tests.cpp
@@ -0,0 +1,186 @@
+#include <boost/test/unit_test.hpp>
+
+#include "../common/database_fixture.hpp"
+
+#include <graphene/chain/hardfork.hpp>
+#include <graphene/chain/son_object.hpp>
+#include <graphene/chain/son_evaluator.hpp>
+
+using namespace graphene::chain;
+using namespace graphene::chain::test;
+
+BOOST_FIXTURE_TEST_SUITE( son_operation_tests, database_fixture )
+
+BOOST_AUTO_TEST_CASE( create_son_test ) {
+   generate_blocks(HARDFORK_SON_TIME);
+   while (db.head_block_time() <= HARDFORK_SON_TIME) {
+      generate_block();
+   }
+   generate_block();
+   set_expiration(db, trx);
+
+   ACTORS((alice)(bob));
+
+   upgrade_to_lifetime_member(alice);
+   upgrade_to_lifetime_member(bob);
+
+   transfer( committee_account, alice_id, asset( 100000 ) );
+   transfer( committee_account, bob_id, asset( 100000 ) );
+
+   set_expiration(db, trx);
+   std::string test_url = "https://create_son_test";
+
+   // create deposit vesting
+   vesting_balance_id_type deposit;
+   {
+      vesting_balance_create_operation op;
+      op.creator = alice_id;
+      op.owner = alice_id;
+      op.amount = asset(10);
+      //op.balance_type = vesting_balance_type::unspecified;
+
+      trx.operations.push_back(op);
+      set_expiration(db, trx);
+      processed_transaction ptx = PUSH_TX(db, trx, ~0);
+      trx.clear();
+      deposit = ptx.operation_results[0].get<object_id_type>();
+   }
+   // create payment vesting
+   vesting_balance_id_type payment;
+   {
+      vesting_balance_create_operation op;
+      op.creator = alice_id;
+      op.owner = alice_id;
+      op.amount = asset(10);
+      //op.balance_type = vesting_balance_type::unspecified;
+
+      trx.operations.push_back(op);
+      set_expiration(db, trx);
+      processed_transaction ptx = PUSH_TX(db, trx, ~0);
+      trx.clear();
+      payment = ptx.operation_results[0].get<object_id_type>();
+   }
+
+   // alice became son
+   {
+      son_create_operation op;
+      op.owner_account = alice_id;
+      op.url = test_url;
+      op.deposit = deposit;
+      op.pay_vb = payment;
+      op.signing_key = alice_public_key;
+      trx.operations.push_back(op);
+      sign(trx, alice_private_key);
+      PUSH_TX(db, trx, ~0);
+   }
+   generate_block();
+
+   const auto& idx = db.get_index_type<son_index>().indices().get<by_account>();
+   BOOST_REQUIRE( idx.size() == 1 );
+   auto obj = idx.find( alice_id );
+   BOOST_REQUIRE( obj != idx.end() );
+   BOOST_CHECK( obj->url == test_url );
+   BOOST_CHECK( obj->signing_key == alice_public_key );
+   BOOST_CHECK( obj->deposit.instance == deposit.instance.value );
+   BOOST_CHECK( obj->pay_vb.instance == payment.instance.value );
+}
+
+BOOST_AUTO_TEST_CASE( update_son_test ) {
+
+   INVOKE(create_son_test);
+   GET_ACTOR(alice);
+
+   std::string new_url = "https://anewurl.com";
+
+   {
+      son_update_operation op;
+      op.owner_account = alice_id;
+      op.new_url = new_url;
+      op.son_id = son_id_type(0);
+
+      trx.operations.push_back(op);
+      sign(trx, alice_private_key);
+      PUSH_TX(db, trx, ~0);
+   }
+   generate_block();
+
+   const auto& idx = db.get_index_type<son_index>().indices().get<by_account>();
+   BOOST_REQUIRE( idx.size() == 1 );
+   auto obj = idx.find( alice_id );
+   BOOST_REQUIRE( obj != idx.end() );
+   BOOST_CHECK( obj->url == new_url );
+}
+
+BOOST_AUTO_TEST_CASE( delete_son_test ) {
+
+   INVOKE(create_son_test);
+   GET_ACTOR(alice);
+
+   {
+      son_delete_operation op;
+      op.owner_account = alice_id;
+      op.son_id = son_id_type(0);
+
+      trx.operations.push_back(op);
+      sign(trx, alice_private_key);
+      PUSH_TX(db, trx, ~0);
+   }
+   generate_block();
+
+   const auto& idx = db.get_index_type<son_index>().indices().get<by_account>();
+   BOOST_REQUIRE( idx.empty() );
+}
+
+BOOST_AUTO_TEST_CASE( update_delete_not_own ) { // fee payer needs to be the son object owner
+try {
+
+   INVOKE(create_son_test);
+   GET_ACTOR(alice);
+   GET_ACTOR(bob);
+
+   // bob tries to update a son object he dont own
+   {
+      son_update_operation op;
+      op.owner_account = bob_id;
+      op.new_url = "whatever";
+      op.son_id = son_id_type(0);
+
+      trx.operations.push_back(op);
+      sign(trx, bob_private_key);
+      GRAPHENE_REQUIRE_THROW(PUSH_TX( db, trx ), fc::exception);
+   }
+   generate_block();
+
+   set_expiration(db, trx);
+   trx.clear();
+
+   const auto& idx = db.get_index_type<son_index>().indices().get<by_account>();
+   auto obj = idx.find( alice_id );
+   BOOST_REQUIRE( obj != idx.end() );
+   // not changing
+   BOOST_CHECK( obj->url == "https://create_son_test" );
+
+   // bob tries to delete a son object he dont own
+   {
+      son_delete_operation op;
+      op.owner_account = bob_id;
+      op.son_id = son_id_type(0);
+
+      trx.operations.push_back(op);
+      sign(trx, bob_private_key);
+      GRAPHENE_REQUIRE_THROW(PUSH_TX( db, trx ), fc::exception);
+
+   }
+   generate_block();
+
+   obj = idx.find( alice_id );
+   // not deleting
+   BOOST_REQUIRE( obj != idx.end() );
+   BOOST_CHECK( obj->son_account.instance ==  alice_id.instance);
+}
+catch (fc::exception &e) {
+   edump((e.to_detail_string()));
+   throw;
+}
+
+} BOOST_AUTO_TEST_SUITE_END()