Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/PropertyClasses/MacroStabilityInwardsSlipPlaneSettingsProperties.cs
===================================================================
diff -u -rac96d7c315129af851634ed5a4a6800b59ede718 -r54c11693eeccda9e154946428d93786face46a9e
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/PropertyClasses/MacroStabilityInwardsSlipPlaneSettingsProperties.cs	(.../MacroStabilityInwardsSlipPlaneSettingsProperties.cs)	(revision ac96d7c315129af851634ed5a4a6800b59ede718)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/PropertyClasses/MacroStabilityInwardsSlipPlaneSettingsProperties.cs	(.../MacroStabilityInwardsSlipPlaneSettingsProperties.cs)	(revision 54c11693eeccda9e154946428d93786face46a9e)
@@ -140,12 +140,12 @@
         {
             if (propertyName == nameof(ZoningBoundariesDeterminationType))
             {
-                return CreateZones == false;
+                return !CreateZones;
             }
 
             if (propertyName == nameof(ZoneBoundaryLeft) || propertyName == nameof(ZoneBoundaryRight))
             {
-                return CreateZones == false || ZoningBoundariesDeterminationType == MacroStabilityInwardsZoningBoundariesDeterminationType.Automatic;
+                return !CreateZones || ZoningBoundariesDeterminationType == MacroStabilityInwardsZoningBoundariesDeterminationType.Automatic;
             }
 
             return false;