diff --git a/data/crac/crac-impl/src/main/java/com/powsybl/openrao/data/cracimpl/OnFlowConstraintInCountryImpl.java b/data/crac/crac-impl/src/main/java/com/powsybl/openrao/data/cracimpl/OnFlowConstraintInCountryImpl.java
index 42f70a88bf..01b39e4d9f 100644
--- a/data/crac/crac-impl/src/main/java/com/powsybl/openrao/data/cracimpl/OnFlowConstraintInCountryImpl.java
+++ b/data/crac/crac-impl/src/main/java/com/powsybl/openrao/data/cracimpl/OnFlowConstraintInCountryImpl.java
@@ -47,6 +47,9 @@ public Optional<Contingency> getContingency() {
 
     @Override
     public UsageMethod getUsageMethod(State state) {
+        if (contingency.isPresent() && !contingency.get().equals(state.getContingency().orElse(null))) {
+            return UsageMethod.UNDEFINED;
+        }
         return state.getInstant().equals(instant) ? usageMethod : UsageMethod.UNDEFINED;
     }
 
diff --git a/data/crac/crac-impl/src/test/java/com/powsybl/openrao/data/cracimpl/OnFlowConstraintInCountryImplTest.java b/data/crac/crac-impl/src/test/java/com/powsybl/openrao/data/cracimpl/OnFlowConstraintInCountryImplTest.java
index 2c8c2c028f..6d649f9edd 100644
--- a/data/crac/crac-impl/src/test/java/com/powsybl/openrao/data/cracimpl/OnFlowConstraintInCountryImplTest.java
+++ b/data/crac/crac-impl/src/test/java/com/powsybl/openrao/data/cracimpl/OnFlowConstraintInCountryImplTest.java
@@ -6,6 +6,7 @@
  */
 package com.powsybl.openrao.data.cracimpl;
 
+import com.powsybl.contingency.Contingency;
 import com.powsybl.openrao.data.cracapi.Instant;
 import com.powsybl.openrao.data.cracapi.InstantKind;
 import com.powsybl.openrao.data.cracapi.State;
@@ -73,4 +74,41 @@ void testEquals() {
         assertNotEquals(onFlowConstraint1, onFlowConstraint2);
         assertNotEquals(onFlowConstraint1.hashCode(), onFlowConstraint2.hashCode());
     }
+
+    @Test
+    void testGetUsageMethodWithContringency() {
+        Contingency contingency1 = Mockito.mock(Contingency.class);
+        Contingency contingency2 = Mockito.mock(Contingency.class);
+
+        State stateAuto1 = new PostContingencyState(contingency1, AUTO_INSTANT);
+        State stateCur1 = new PostContingencyState(contingency1, CURATIVE_INSTANT);
+        State stateAuto2 = new PostContingencyState(contingency2, AUTO_INSTANT);
+        State stateCur2 = new PostContingencyState(contingency2, CURATIVE_INSTANT);
+
+        OnFlowConstraintInCountry ur;
+
+        ur = new OnFlowConstraintInCountryImpl(UsageMethod.AVAILABLE, AUTO_INSTANT, Optional.of(contingency1), Country.ES);
+        assertEquals(UsageMethod.AVAILABLE, ur.getUsageMethod(stateAuto1));
+        assertEquals(UsageMethod.UNDEFINED, ur.getUsageMethod(stateCur1));
+        assertEquals(UsageMethod.UNDEFINED, ur.getUsageMethod(stateAuto2));
+        assertEquals(UsageMethod.UNDEFINED, ur.getUsageMethod(stateCur2));
+
+        ur = new OnFlowConstraintInCountryImpl(UsageMethod.AVAILABLE, AUTO_INSTANT, Optional.empty(), Country.ES);
+        assertEquals(UsageMethod.AVAILABLE, ur.getUsageMethod(stateAuto1));
+        assertEquals(UsageMethod.UNDEFINED, ur.getUsageMethod(stateCur1));
+        assertEquals(UsageMethod.AVAILABLE, ur.getUsageMethod(stateAuto2));
+        assertEquals(UsageMethod.UNDEFINED, ur.getUsageMethod(stateCur2));
+
+        ur = new OnFlowConstraintInCountryImpl(UsageMethod.AVAILABLE, CURATIVE_INSTANT, Optional.of(contingency1), Country.ES);
+        assertEquals(UsageMethod.UNDEFINED, ur.getUsageMethod(stateAuto1));
+        assertEquals(UsageMethod.AVAILABLE, ur.getUsageMethod(stateCur1));
+        assertEquals(UsageMethod.UNDEFINED, ur.getUsageMethod(stateAuto2));
+        assertEquals(UsageMethod.UNDEFINED, ur.getUsageMethod(stateCur2));
+
+        ur = new OnFlowConstraintInCountryImpl(UsageMethod.AVAILABLE, CURATIVE_INSTANT, Optional.empty(), Country.ES);
+        assertEquals(UsageMethod.UNDEFINED, ur.getUsageMethod(stateAuto1));
+        assertEquals(UsageMethod.AVAILABLE, ur.getUsageMethod(stateCur1));
+        assertEquals(UsageMethod.UNDEFINED, ur.getUsageMethod(stateAuto2));
+        assertEquals(UsageMethod.AVAILABLE, ur.getUsageMethod(stateCur2));
+    }
 }
diff --git a/ra-optimisation/search-tree-rao/src/test/java/com/powsybl/openrao/searchtreerao/commons/RaoUtilTest.java b/ra-optimisation/search-tree-rao/src/test/java/com/powsybl/openrao/searchtreerao/commons/RaoUtilTest.java
index a35cad9678..b0feed4731 100644
--- a/ra-optimisation/search-tree-rao/src/test/java/com/powsybl/openrao/searchtreerao/commons/RaoUtilTest.java
+++ b/ra-optimisation/search-tree-rao/src/test/java/com/powsybl/openrao/searchtreerao/commons/RaoUtilTest.java
@@ -340,6 +340,7 @@ void testIsOnFlowConstraintInCountryAvailableWithContingency() {
         Instant curativeInstant = crac.getInstant(CURATIVE_INSTANT_ID);
         State optimizedState = Mockito.mock(State.class);
         when(optimizedState.getInstant()).thenReturn(curativeInstant);
+        when(optimizedState.getContingency()).thenReturn(Optional.of(crac.getContingency("Contingency FR1 FR3")));
 
         FlowCnec cnecCont1 = crac.getFlowCnec("cnec1stateCurativeContingency1");
         FlowCnec cnecCont2 = crac.getFlowCnec("cnec2stateCurativeContingency2");