Index: Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Forms/PropertyClasses/StabilityPointStructuresInputContextProperties.cs
===================================================================
diff -u -r7d922899412d52bcc7c2f1432589dfcd62d364b4 -r29ea5c2a787d37a464dea4d50acfebbc5472367f
--- Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Forms/PropertyClasses/StabilityPointStructuresInputContextProperties.cs	(.../StabilityPointStructuresInputContextProperties.cs)	(revision 7d922899412d52bcc7c2f1432589dfcd62d364b4)
+++ Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Forms/PropertyClasses/StabilityPointStructuresInputContextProperties.cs	(.../StabilityPointStructuresInputContextProperties.cs)	(revision 29ea5c2a787d37a464dea4d50acfebbc5472367f)
@@ -260,9 +260,7 @@
             get
             {
                 return new NormalDistributionProperties(
-                    HasStructure()
-                        ? DistributionPropertiesReadOnly.StandardDeviation
-                        : DistributionPropertiesReadOnly.All,
+                    DistributionPropertiesReadOnly.StandardDeviation,
                     data.WrappedData.DrainCoefficient,
                     PropertyChangeHandler);
             }
Index: Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.Forms.Test/PropertyClasses/StabilityPointStructuresInputContextPropertiesTest.cs
===================================================================
diff -u -r803c689399dacba19bb6679031b14485487f1b69 -r29ea5c2a787d37a464dea4d50acfebbc5472367f
--- Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.Forms.Test/PropertyClasses/StabilityPointStructuresInputContextPropertiesTest.cs	(.../StabilityPointStructuresInputContextPropertiesTest.cs)	(revision 803c689399dacba19bb6679031b14485487f1b69)
+++ Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.Forms.Test/PropertyClasses/StabilityPointStructuresInputContextPropertiesTest.cs	(.../StabilityPointStructuresInputContextPropertiesTest.cs)	(revision 29ea5c2a787d37a464dea4d50acfebbc5472367f)
@@ -1152,7 +1152,6 @@
             PropertyDescriptor probabilityCollisionSecondaryStructure = dynamicProperties[probabilityCollisionSecondaryStructurePropertyIndex];
             Assert.IsTrue(probabilityCollisionSecondaryStructure.IsReadOnly);
 
-            DistributionPropertiesTestHelper.AssertPropertiesAreReadOnly(properties.DrainCoefficient, true, true);
             DistributionPropertiesTestHelper.AssertPropertiesAreReadOnly(properties.LevelCrestStructure, true, true);
             DistributionPropertiesTestHelper.AssertPropertiesAreReadOnly(properties.ThresholdHeightOpenWeir, true, true);
             DistributionPropertiesTestHelper.AssertPropertiesAreReadOnly(properties.AreaFlowApertures, true, true);