Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/PropertyClasses/MacroStabilityInwardsInputContextProperties.cs
===================================================================
diff -u -rf00ef179f4b76ecd6fcfe67b1e6ea797e8525509 -r2f0f4e0bd2be4afb1e2b8f5b2380c6a8abea8ad3
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/PropertyClasses/MacroStabilityInwardsInputContextProperties.cs	(.../MacroStabilityInwardsInputContextProperties.cs)	(revision f00ef179f4b76ecd6fcfe67b1e6ea797e8525509)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/PropertyClasses/MacroStabilityInwardsInputContextProperties.cs	(.../MacroStabilityInwardsInputContextProperties.cs)	(revision 2f0f4e0bd2be4afb1e2b8f5b2380c6a8abea8ad3)
@@ -69,34 +69,38 @@
         private const int settingsCategoryIndex = 3;
         private const int totalCategoryCount = 3;
 
-        private readonly RoundedDouble normativeAssessmentLevel;
+        private readonly Func<RoundedDouble> getNormativeAssessmentLevelFunc;
         private readonly IObservablePropertyChangeHandler propertyChangeHandler;
 
         /// <summary>
         /// Creates a new instance of <see cref="MacroStabilityInwardsInputContextProperties"/>.
         /// </summary>
         /// <param name="data">The instance to show the properties for.</param>
-        /// <param name="normativeAssessmentLevel">The normative assessment level.</param>
+        /// <param name="getNormativeAssessmentLevelFunc"><see cref="Func{TResult}"/> for obtaining the normative assessment level.</param>
         /// <param name="propertyChangeHandler">The handler responsible for handling effects of a property change.</param>
-        /// <exception cref="ArgumentNullException">Thrown when <paramref name="data"/> or
-        /// <paramref name="propertyChangeHandler"/> is <c>null</c>.</exception>
+        /// <exception cref="ArgumentNullException">Thrown when any parameter is <c>null</c>.</exception>
         public MacroStabilityInwardsInputContextProperties(MacroStabilityInwardsInputContext data,
-                                                           RoundedDouble normativeAssessmentLevel,
+                                                           Func<RoundedDouble> getNormativeAssessmentLevelFunc,
                                                            IObservablePropertyChangeHandler propertyChangeHandler)
         {
             if (data == null)
             {
                 throw new ArgumentNullException(nameof(data));
             }
 
+            if (getNormativeAssessmentLevelFunc == null)
+            {
+                throw new ArgumentNullException(nameof(getNormativeAssessmentLevelFunc));
+            }
+
             if (propertyChangeHandler == null)
             {
                 throw new ArgumentNullException(nameof(this.propertyChangeHandler));
             }
 
             Data = data;
 
-            this.normativeAssessmentLevel = normativeAssessmentLevel;
+            this.getNormativeAssessmentLevelFunc = getNormativeAssessmentLevelFunc;
             this.propertyChangeHandler = propertyChangeHandler;
         }
 
@@ -197,7 +201,7 @@
             {
                 return data.WrappedData.UseAssessmentLevelManualInput
                            ? data.WrappedData.AssessmentLevel
-                           : normativeAssessmentLevel;
+                           : getNormativeAssessmentLevelFunc();
             }
             set
             {