diff --git a/integration-tests/deployment/ccip/add_chain.go b/integration-tests/deployment/ccip/add_chain.go
index 550d6168a15..0ae87d38344 100644
--- a/integration-tests/deployment/ccip/add_chain.go
+++ b/integration-tests/deployment/ccip/add_chain.go
@@ -3,6 +3,7 @@ package ccipdeployment
 import (
 	"math/big"
 
+	"github.com/ethereum/go-ethereum/common"
 	"github.com/smartcontractkit/ccip-owner-contracts/tools/proposal/mcms"
 	"github.com/smartcontractkit/ccip-owner-contracts/tools/proposal/timelock"
 
@@ -33,7 +34,8 @@ func NewChainInboundProposal(
 ) (*timelock.MCMSWithTimelockProposal, error) {
 	// Generate proposal which enables new destination (from test router) on all source chains.
 	var batches []timelock.BatchChainOperation
-	metaDataPerChain := make(map[mcms.ChainIdentifier]timelock.MCMSWithTimelockChainMetadata)
+	metaDataPerChain := make(map[mcms.ChainIdentifier]mcms.ChainMetadata)
+	timelockAddresses := make(map[mcms.ChainIdentifier]common.Address)
 	for _, source := range sources {
 		chain, _ := chainsel.ChainBySelector(source)
 		enableOnRampDest, err := state.Chains[source].OnRamp.ApplyDestChainConfigUpdates(SimTransactOpts(), []onramp.OnRampDestChainConfigArgs{
@@ -92,13 +94,15 @@ func NewChainInboundProposal(
 				},
 			},
 		})
-		metaDataPerChain[mcms.ChainIdentifier(chain.Selector)] = timelock.MCMSWithTimelockChainMetadata{
-			ChainMetadata: mcms.ChainMetadata{
-				NonceOffset: 0,
-				MCMAddress:  state.Chains[source].Mcm.Address(),
-			},
-			TimelockAddress: state.Chains[source].Timelock.Address(),
+		opCount, err := state.Chains[source].Mcm.GetOpCount(nil)
+		if err != nil {
+			return nil, err
+		}
+		metaDataPerChain[mcms.ChainIdentifier(chain.Selector)] = mcms.ChainMetadata{
+			StartingOpCount: opCount.Uint64(),
+			MCMAddress:      state.Chains[source].Mcm.Address(),
 		}
+		timelockAddresses[mcms.ChainIdentifier(chain.Selector)] = state.Chains[source].Timelock.Address()
 	}
 
 	// Home chain new don.
@@ -146,13 +150,15 @@ func NewChainInboundProposal(
 		return nil, err
 	}
 	homeChain, _ := chainsel.ChainBySelector(homeChainSel)
-	metaDataPerChain[mcms.ChainIdentifier(homeChain.Selector)] = timelock.MCMSWithTimelockChainMetadata{
-		ChainMetadata: mcms.ChainMetadata{
-			NonceOffset: 0,
-			MCMAddress:  state.Chains[homeChainSel].Mcm.Address(),
-		},
-		TimelockAddress: state.Chains[homeChainSel].Timelock.Address(),
+	opCount, err := state.Chains[homeChainSel].Mcm.GetOpCount(nil)
+	if err != nil {
+		return nil, err
+	}
+	metaDataPerChain[mcms.ChainIdentifier(homeChain.Selector)] = mcms.ChainMetadata{
+		StartingOpCount: opCount.Uint64(),
+		MCMAddress:      state.Chains[homeChainSel].Mcm.Address(),
 	}
+	timelockAddresses[mcms.ChainIdentifier(homeChain.Selector)] = state.Chains[homeChainSel].Timelock.Address()
 	batches = append(batches, timelock.BatchChainOperation{
 		ChainIdentifier: mcms.ChainIdentifier(homeChain.Selector),
 		Batch: []mcms.Operation{
@@ -175,6 +181,7 @@ func NewChainInboundProposal(
 		[]mcms.Signature{},
 		false,
 		metaDataPerChain,
+		timelockAddresses,
 		"blah", // TODO
 		batches,
 		timelock.Schedule,
diff --git a/integration-tests/deployment/ccip/propose.go b/integration-tests/deployment/ccip/propose.go
index eced93dde0f..fca971aaf0d 100644
--- a/integration-tests/deployment/ccip/propose.go
+++ b/integration-tests/deployment/ccip/propose.go
@@ -34,9 +34,7 @@ func SignProposal(t *testing.T, env deployment.Environment, proposal *timelock.M
 		chainSel := mcms.ChainIdentifier(chainselc.Selector)
 		executorClients[chainSel] = chain.Client
 	}
-	realProposal, err := proposal.ToMCMSOnlyProposal()
-	require.NoError(t, err)
-	executor, err := realProposal.ToExecutor(executorClients)
+	executor, err := proposal.ToExecutor(true)
 	require.NoError(t, err)
 	payload, err := executor.SigningHash()
 	require.NoError(t, err)
@@ -45,7 +43,7 @@ func SignProposal(t *testing.T, env deployment.Environment, proposal *timelock.M
 	require.NoError(t, err)
 	mcmSig, err := mcms.NewSignatureFromBytes(sig)
 	require.NoError(t, err)
-	executor.Proposal.Signatures = append(executor.Proposal.Signatures, mcmSig)
+	executor.Proposal.AddSignature(mcmSig)
 	require.NoError(t, executor.Proposal.Validate())
 	return executor
 }
@@ -53,7 +51,7 @@ func SignProposal(t *testing.T, env deployment.Environment, proposal *timelock.M
 func ExecuteProposal(t *testing.T, env deployment.Environment, executor *mcms.Executor,
 	state CCIPOnChainState, sel uint64) {
 	// Set the root.
-	tx, err2 := executor.SetRootOnChain(env.Chains[sel].DeployerKey, mcms.ChainIdentifier(sel))
+	tx, err2 := executor.SetRootOnChain(env.Chains[sel].Client, env.Chains[sel].DeployerKey, mcms.ChainIdentifier(sel))
 	require.NoError(t, err2)
 	_, err2 = env.Chains[sel].Confirm(tx)
 	require.NoError(t, err2)
@@ -63,7 +61,7 @@ func ExecuteProposal(t *testing.T, env deployment.Environment, executor *mcms.Ex
 	for _, chainOp := range executor.Operations[mcms.ChainIdentifier(sel)] {
 		for idx, op := range executor.ChainAgnosticOps {
 			if bytes.Equal(op.Data, chainOp.Data) && op.To == chainOp.To {
-				opTx, err3 := executor.ExecuteOnChain(env.Chains[sel].DeployerKey, idx)
+				opTx, err3 := executor.ExecuteOnChain(env.Chains[sel].Client, env.Chains[sel].DeployerKey, idx)
 				require.NoError(t, err3)
 				block, err3 := env.Chains[sel].Confirm(opTx)
 				require.NoError(t, err3)
@@ -104,7 +102,8 @@ func GenerateAcceptOwnershipProposal(
 ) (*timelock.MCMSWithTimelockProposal, error) {
 	// TODO: Accept rest of contracts
 	var batches []timelock.BatchChainOperation
-	metaDataPerChain := make(map[mcms.ChainIdentifier]timelock.MCMSWithTimelockChainMetadata)
+	metaDataPerChain := make(map[mcms.ChainIdentifier]mcms.ChainMetadata)
+	timelockAddresses := make(map[mcms.ChainIdentifier]common.Address)
 	for _, sel := range chains {
 		chain, _ := chainsel.ChainBySelector(sel)
 		acceptOnRamp, err := state.Chains[sel].OnRamp.AcceptOwnership(SimTransactOpts())
@@ -116,13 +115,15 @@ func GenerateAcceptOwnershipProposal(
 			return nil, err
 		}
 		chainSel := mcms.ChainIdentifier(chain.Selector)
-		metaDataPerChain[chainSel] = timelock.MCMSWithTimelockChainMetadata{
-			ChainMetadata: mcms.ChainMetadata{
-				NonceOffset: 0,
-				MCMAddress:  state.Chains[sel].Mcm.Address(),
-			},
-			TimelockAddress: state.Chains[sel].Timelock.Address(),
+		opCount, err := state.Chains[sel].Mcm.GetOpCount(nil)
+		if err != nil {
+			return nil, err
+		}
+		metaDataPerChain[chainSel] = mcms.ChainMetadata{
+			MCMAddress:      state.Chains[sel].Mcm.Address(),
+			StartingOpCount: opCount.Uint64(),
 		}
+		timelockAddresses[chainSel] = state.Chains[sel].Timelock.Address()
 		batches = append(batches, timelock.BatchChainOperation{
 			ChainIdentifier: chainSel,
 			Batch: []mcms.Operation{
@@ -139,6 +140,7 @@ func GenerateAcceptOwnershipProposal(
 			},
 		})
 	}
+
 	acceptCR, err := state.Chains[homeChain].CapabilityRegistry.AcceptOwnership(SimTransactOpts())
 	if err != nil {
 		return nil, err
@@ -148,13 +150,15 @@ func GenerateAcceptOwnershipProposal(
 		return nil, err
 	}
 	homeChainID := mcms.ChainIdentifier(homeChain)
-	metaDataPerChain[homeChainID] = timelock.MCMSWithTimelockChainMetadata{
-		ChainMetadata: mcms.ChainMetadata{
-			NonceOffset: 0,
-			MCMAddress:  state.Chains[homeChain].Mcm.Address(),
-		},
-		TimelockAddress: state.Chains[homeChain].Timelock.Address(),
+	opCount, err := state.Chains[homeChain].Mcm.GetOpCount(nil)
+	if err != nil {
+		return nil, err
 	}
+	metaDataPerChain[homeChainID] = mcms.ChainMetadata{
+		StartingOpCount: opCount.Uint64(),
+		MCMAddress:      state.Chains[homeChain].Mcm.Address(),
+	}
+	timelockAddresses[homeChainID] = state.Chains[homeChain].Timelock.Address()
 	batches = append(batches, timelock.BatchChainOperation{
 		ChainIdentifier: homeChainID,
 		Batch: []mcms.Operation{
@@ -170,12 +174,14 @@ func GenerateAcceptOwnershipProposal(
 			},
 		},
 	})
+
 	return timelock.NewMCMSWithTimelockProposal(
 		"1",
 		2004259681, // TODO
 		[]mcms.Signature{},
 		false,
 		metaDataPerChain,
+		timelockAddresses,
 		"blah", // TODO
 		batches,
 		timelock.Schedule, "0s")
diff --git a/integration-tests/go.mod b/integration-tests/go.mod
index dbfda153c5a..6188a31caef 100644
--- a/integration-tests/go.mod
+++ b/integration-tests/go.mod
@@ -36,7 +36,7 @@ require (
 	github.com/sethvargo/go-retry v0.2.4
 	github.com/shopspring/decimal v1.4.0
 	github.com/slack-go/slack v0.12.2
-	github.com/smartcontractkit/ccip-owner-contracts v0.0.0-20240910151738-3f318badcfb5
+	github.com/smartcontractkit/ccip-owner-contracts v0.0.0-20240919155713-f4bf4ae0b9c6
 	github.com/smartcontractkit/chain-selectors v1.0.23
 	github.com/smartcontractkit/chainlink-automation v1.0.4
 	github.com/smartcontractkit/chainlink-ccip v0.0.0-20240920150748-cf2125c094fe
diff --git a/integration-tests/go.sum b/integration-tests/go.sum
index dace088e6dc..9f7881750d6 100644
--- a/integration-tests/go.sum
+++ b/integration-tests/go.sum
@@ -1417,8 +1417,8 @@ github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ
 github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 github.com/slack-go/slack v0.12.2 h1:x3OppyMyGIbbiyFhsBmpf9pwkUzMhthJMRNmNlA4LaQ=
 github.com/slack-go/slack v0.12.2/go.mod h1:hlGi5oXA+Gt+yWTPP0plCdRKmjsDxecdHxYQdlMQKOw=
-github.com/smartcontractkit/ccip-owner-contracts v0.0.0-20240910151738-3f318badcfb5 h1:m0HuGuVdRHqBBkHJpSR/QBV7gtLB+hFkXZQ9tEkjdzo=
-github.com/smartcontractkit/ccip-owner-contracts v0.0.0-20240910151738-3f318badcfb5/go.mod h1:N60/wwocvZ5A3RGmYaMWo0fPFa5tTMlhI9lJ22DRktM=
+github.com/smartcontractkit/ccip-owner-contracts v0.0.0-20240919155713-f4bf4ae0b9c6 h1:e4lR/xTK7iOeCniSwH6hdaNZZ/sJs1eYWpnJoz3CXxI=
+github.com/smartcontractkit/ccip-owner-contracts v0.0.0-20240919155713-f4bf4ae0b9c6/go.mod h1:nlRI0m23HFMAHf7cKYdE58mPbXsTyY1y3ZLJxnuuoCM=
 github.com/smartcontractkit/chain-selectors v1.0.23 h1:D2Eaex4Cw/O7Lg3tX6WklOqnjjIQAEBnutCtksPzVDY=
 github.com/smartcontractkit/chain-selectors v1.0.23/go.mod h1:d4Hi+E1zqjy9HqMkjBE5q1vcG9VGgxf5VxiRHfzi2kE=
 github.com/smartcontractkit/chainlink-automation v1.0.4 h1:iyW181JjKHLNMnDleI8umfIfVVlwC7+n5izbLSFgjw8=