Index: Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/StructuresInputBaseProperties.cs
===================================================================
diff -u -rf3c7ae4cc9069268dba97e9dd691bf449fa393db -r449b5831547d5a6391da8ad825e7c845ef7ecc1c
--- Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/StructuresInputBaseProperties.cs	(.../StructuresInputBaseProperties.cs)	(revision f3c7ae4cc9069268dba97e9dd691bf449fa393db)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/PropertyClasses/StructuresInputBaseProperties.cs	(.../StructuresInputBaseProperties.cs)	(revision 449b5831547d5a6391da8ad825e7c845ef7ecc1c)
@@ -568,7 +568,7 @@
         }
 
         [DynamicReadOnlyValidationMethod]
-        public bool IsReadOnly(string property)
+        public virtual bool IsReadOnly(string property)
         {
             if (property == nameof(StructureNormalOrientation))
             {