Index: Ringtoets/Integration/src/Ringtoets.Integration.IO/Handlers/IHydraulicBoundaryDatabaseUpdateHandler.cs
===================================================================
diff -u -r9a3bc5fa510d6e744f8edec4825daf0e0f40f865 -r60449dd57afa878b9deca929461da09da77ab107
--- Ringtoets/Integration/src/Ringtoets.Integration.IO/Handlers/IHydraulicBoundaryDatabaseUpdateHandler.cs	(.../IHydraulicBoundaryDatabaseUpdateHandler.cs)	(revision 9a3bc5fa510d6e744f8edec4825daf0e0f40f865)
+++ Ringtoets/Integration/src/Ringtoets.Integration.IO/Handlers/IHydraulicBoundaryDatabaseUpdateHandler.cs	(.../IHydraulicBoundaryDatabaseUpdateHandler.cs)	(revision 60449dd57afa878b9deca929461da09da77ab107)
@@ -35,9 +35,10 @@
         /// <summary>
         /// Checks whether confirmation is required before updating the <see cref="HydraulicBoundaryDatabase"/>.
         /// </summary>
+        /// <param name="hydraulicBoundaryDatabase">The hydraulic boundary database.</param>
         /// <param name="readHydraulicBoundaryDatabase">The read hydraulic boundary database.</param>
         /// <returns><c>true</c> when confirmation is required; <c>false</c> otherwise.</returns>
-        bool IsConfirmationRequired(ReadHydraulicBoundaryDatabase readHydraulicBoundaryDatabase);
+        bool IsConfirmationRequired(HydraulicBoundaryDatabase hydraulicBoundaryDatabase, ReadHydraulicBoundaryDatabase readHydraulicBoundaryDatabase);
 
         /// <summary>
         /// Gets confirmation for updating the <see cref="HydraulicBoundaryDatabase"/>.
Index: Ringtoets/Integration/src/Ringtoets.Integration.IO/Importers/HydraulicBoundaryDatabaseImporter.cs
===================================================================
diff -u -rceaf0239a1fabbde77c9c53d26abd1aaee11f30e -r60449dd57afa878b9deca929461da09da77ab107
--- Ringtoets/Integration/src/Ringtoets.Integration.IO/Importers/HydraulicBoundaryDatabaseImporter.cs	(.../HydraulicBoundaryDatabaseImporter.cs)	(revision ceaf0239a1fabbde77c9c53d26abd1aaee11f30e)
+++ Ringtoets/Integration/src/Ringtoets.Integration.IO/Importers/HydraulicBoundaryDatabaseImporter.cs	(.../HydraulicBoundaryDatabaseImporter.cs)	(revision 60449dd57afa878b9deca929461da09da77ab107)
@@ -120,7 +120,7 @@
         {
             var clearDependentData = false;
 
-            if (updateHandler.IsConfirmationRequired(readHydraulicBoundaryDatabase))
+            if (updateHandler.IsConfirmationRequired(ImportTarget, readHydraulicBoundaryDatabase))
             {
                 if (!updateHandler.InquireConfirmation())
                 {
Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/HydraulicBoundaryDatabaseUpdateHandler.cs
===================================================================
diff -u -r32d96bc10b1f0871512205da08fab72b77c36901 -r60449dd57afa878b9deca929461da09da77ab107
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/HydraulicBoundaryDatabaseUpdateHandler.cs	(.../HydraulicBoundaryDatabaseUpdateHandler.cs)	(revision 32d96bc10b1f0871512205da08fab72b77c36901)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/HydraulicBoundaryDatabaseUpdateHandler.cs	(.../HydraulicBoundaryDatabaseUpdateHandler.cs)	(revision 60449dd57afa878b9deca929461da09da77ab107)
@@ -53,7 +53,7 @@
             this.assessmentSection = assessmentSection;
         }
 
-        public bool IsConfirmationRequired(ReadHydraulicBoundaryDatabase readHydraulicBoundaryDatabase)
+        public bool IsConfirmationRequired(HydraulicBoundaryDatabase hydraulicBoundaryDatabase, ReadHydraulicBoundaryDatabase readHydraulicBoundaryDatabase)
         {
             throw new NotImplementedException();
         }
Index: Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Importers/HydraulicBoundaryDatabaseImporterTest.cs
===================================================================
diff -u -rceaf0239a1fabbde77c9c53d26abd1aaee11f30e -r60449dd57afa878b9deca929461da09da77ab107
--- Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Importers/HydraulicBoundaryDatabaseImporterTest.cs	(.../HydraulicBoundaryDatabaseImporterTest.cs)	(revision ceaf0239a1fabbde77c9c53d26abd1aaee11f30e)
+++ Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Importers/HydraulicBoundaryDatabaseImporterTest.cs	(.../HydraulicBoundaryDatabaseImporterTest.cs)	(revision 60449dd57afa878b9deca929461da09da77ab107)
@@ -171,7 +171,7 @@
             // Setup
             var mocks = new MockRepository();
             var handler = mocks.StrictMock<IHydraulicBoundaryDatabaseUpdateHandler>();
-            handler.Stub(h => h.IsConfirmationRequired(null)).IgnoreArguments().Return(false);
+            handler.Stub(h => h.IsConfirmationRequired(null, null)).IgnoreArguments().Return(false);
             mocks.ReplayAll();
 
             string path = Path.Combine(testDataPath, "withoutHLCD", "complete.sqlite");
@@ -196,7 +196,7 @@
             // Setup
             var mocks = new MockRepository();
             var handler = mocks.StrictMock<IHydraulicBoundaryDatabaseUpdateHandler>();
-            handler.Stub(h => h.IsConfirmationRequired(null)).IgnoreArguments().Return(false);
+            handler.Stub(h => h.IsConfirmationRequired(null, null)).IgnoreArguments().Return(false);
             mocks.ReplayAll();
 
             string path = Path.Combine(testDataPath, "EmptyHLCDSchema", "complete.sqlite");
@@ -222,7 +222,7 @@
             // Setup
             var mocks = new MockRepository();
             var handler = mocks.StrictMock<IHydraulicBoundaryDatabaseUpdateHandler>();
-            handler.Stub(h => h.IsConfirmationRequired(null)).IgnoreArguments().Return(false);
+            handler.Stub(h => h.IsConfirmationRequired(null, null)).IgnoreArguments().Return(false);
             mocks.ReplayAll();
 
             string path = Path.Combine(testDataPath, "InvalidHLCDSchema", "complete.sqlite");
@@ -248,7 +248,7 @@
             // Setup
             var mocks = new MockRepository();
             var handler = mocks.StrictMock<IHydraulicBoundaryDatabaseUpdateHandler>();
-            handler.Stub(h => h.IsConfirmationRequired(null)).IgnoreArguments().Return(false);
+            handler.Stub(h => h.IsConfirmationRequired(null, null)).IgnoreArguments().Return(false);
             mocks.ReplayAll();
 
             string path = Path.Combine(testDataPath, "withoutSettings", "complete.sqlite");
@@ -276,16 +276,15 @@
 
             var mocks = new MockRepository();
             var handler = mocks.StrictMock<IHydraulicBoundaryDatabaseUpdateHandler>();
-            handler.Stub(h => h.IsConfirmationRequired(Arg<ReadHydraulicBoundaryDatabase>.Is.NotNull))
-                   .WhenCalled(invocation => { AssertReadHydraulicBoundaryDatabase((ReadHydraulicBoundaryDatabase) invocation.Arguments[0]); })
+            handler.Stub(h => h.IsConfirmationRequired(Arg<HydraulicBoundaryDatabase>.Is.Same(hydraulicBoundaryDatabase),
+                                                       Arg<ReadHydraulicBoundaryDatabase>.Is.NotNull))
+                   .WhenCalled(invocation => { AssertReadHydraulicBoundaryDatabase((ReadHydraulicBoundaryDatabase) invocation.Arguments[1]); })
                    .Return(false);
-            handler.Expect(h => h.Update(Arg<HydraulicBoundaryDatabase>.Is.NotNull,
+            handler.Expect(h => h.Update(Arg<HydraulicBoundaryDatabase>.Is.Same(hydraulicBoundaryDatabase),
                                          Arg<ReadHydraulicBoundaryDatabase>.Is.NotNull,
                                          Arg<ReadHydraulicLocationConfigurationDatabase>.Is.NotNull))
                    .WhenCalled(invocation =>
                    {
-                       Assert.AreSame(hydraulicBoundaryDatabase, invocation.Arguments[0]);
-
                        AssertReadHydraulicBoundaryDatabase((ReadHydraulicBoundaryDatabase) invocation.Arguments[1]);
 
                        var readHydraulicLocationConfigurationDatabase = (ReadHydraulicLocationConfigurationDatabase) invocation.Arguments[2];
@@ -311,7 +310,7 @@
             // Setup
             var mocks = new MockRepository();
             var handler = mocks.Stub<IHydraulicBoundaryDatabaseUpdateHandler>();
-            handler.Stub(h => h.IsConfirmationRequired(null)).IgnoreArguments().Return(false);
+            handler.Stub(h => h.IsConfirmationRequired(null, null)).IgnoreArguments().Return(false);
             handler.Stub(h => h.Update(null, null, null)).IgnoreArguments().Return(Enumerable.Empty<IObservable>());
             mocks.ReplayAll();
 
@@ -370,8 +369,9 @@
             // Setup
             var mocks = new MockRepository();
             var handler = mocks.StrictMock<IHydraulicBoundaryDatabaseUpdateHandler>();
-            handler.Expect(h => h.IsConfirmationRequired(Arg<ReadHydraulicBoundaryDatabase>.Is.NotNull))
-                   .WhenCalled(invocation => { AssertReadHydraulicBoundaryDatabase((ReadHydraulicBoundaryDatabase) invocation.Arguments[0]); })
+            handler.Expect(h => h.IsConfirmationRequired(Arg<HydraulicBoundaryDatabase>.Is.NotNull,
+                                                         Arg<ReadHydraulicBoundaryDatabase>.Is.NotNull))
+                   .WhenCalled(invocation => { AssertReadHydraulicBoundaryDatabase((ReadHydraulicBoundaryDatabase) invocation.Arguments[1]); })
                    .Return(true);
             handler.Expect(h => h.InquireConfirmation()).Return(false);
             mocks.ReplayAll();
@@ -401,7 +401,7 @@
             // Setup
             var mocks = new MockRepository();
             var handler = mocks.StrictMock<IHydraulicBoundaryDatabaseUpdateHandler>();
-            handler.Stub(h => h.IsConfirmationRequired(null)).IgnoreArguments().Return(false);
+            handler.Stub(h => h.IsConfirmationRequired(null, null)).IgnoreArguments().Return(false);
             mocks.ReplayAll();
 
             string filePath = Path.Combine(testDataPath, "complete.sqlite");
@@ -435,7 +435,7 @@
             // Setup
             var mocks = new MockRepository();
             var handler = mocks.Stub<IHydraulicBoundaryDatabaseUpdateHandler>();
-            handler.Stub(h => h.IsConfirmationRequired(null)).IgnoreArguments().Return(false);
+            handler.Stub(h => h.IsConfirmationRequired(null, null)).IgnoreArguments().Return(false);
             handler.Stub(h => h.Update(null, null, null)).IgnoreArguments().Return(Enumerable.Empty<IObservable>());
             mocks.ReplayAll();
 
@@ -479,7 +479,7 @@
             observable2.Expect(o => o.NotifyObservers());
 
             var handler = mocks.StrictMock<IHydraulicBoundaryDatabaseUpdateHandler>();
-            handler.Expect(h => h.IsConfirmationRequired(null)).IgnoreArguments().Return(true);
+            handler.Expect(h => h.IsConfirmationRequired(null, null)).IgnoreArguments().Return(true);
             handler.Expect(h => h.InquireConfirmation()).Return(true);
             handler.Expect(h => h.Update(Arg<HydraulicBoundaryDatabase>.Is.Same(hydraulicBoundaryDatabase),
                                          Arg<ReadHydraulicBoundaryDatabase>.Is.NotNull,
@@ -516,7 +516,7 @@
             var observer = mocks.StrictMock<IObserver>();
             var handler = mocks.StrictMock<IHydraulicBoundaryDatabaseUpdateHandler>();
             var importer = new HydraulicBoundaryDatabaseImporter(hydraulicBoundaryDatabase, handler, filePath);
-            handler.Expect(h => h.IsConfirmationRequired(null)).IgnoreArguments()
+            handler.Expect(h => h.IsConfirmationRequired(null, null)).IgnoreArguments()
                    .WhenCalled(invocation => importer.Cancel())
                    .Return(false);