Index: Ringtoets/Common/src/Ringtoets.Common.Data/Contribution/FailureMechanismContribution.cs
===================================================================
diff -u -r2ff2a985fe9015df6da49fe43006e5c7631434c3 -r0a5a1c7fad7e52c152e3ff34eebcccf7785b377d
--- Ringtoets/Common/src/Ringtoets.Common.Data/Contribution/FailureMechanismContribution.cs	(.../FailureMechanismContribution.cs)	(revision 2ff2a985fe9015df6da49fe43006e5c7631434c3)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/Contribution/FailureMechanismContribution.cs	(.../FailureMechanismContribution.cs)	(revision 0a5a1c7fad7e52c152e3ff34eebcccf7785b377d)
@@ -77,7 +77,7 @@
             {
                 if (double.IsNaN(value) || value < 0.0 || value > 1.0)
                 {
-                    throw new ArgumentOutOfRangeException("value", Resources.FailureMechanismContributionItem_Norm_must_be_larger_than_zero);
+                    throw new ArgumentOutOfRangeException("value", Resources.Probability_Must_be_in_range_zero_to_one);
                 }
                 norm = value;
                 distribution.ForEachElementDo(d => d.Norm = norm);
Index: Ringtoets/Common/src/Ringtoets.Common.Data/Properties/Resources.Designer.cs
===================================================================
diff -u -rba3865a26a9d4893855dd528ea1ad804d1cdae61 -r0a5a1c7fad7e52c152e3ff34eebcccf7785b377d
--- Ringtoets/Common/src/Ringtoets.Common.Data/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision ba3865a26a9d4893855dd528ea1ad804d1cdae61)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 0a5a1c7fad7e52c152e3ff34eebcccf7785b377d)
@@ -22,7 +22,7 @@
 //------------------------------------------------------------------------------
 // <auto-generated>
 //     This code was generated by a tool.
-//     Runtime Version:4.0.30319.17929
+//     Runtime Version:4.0.30319.42000
 //
 //     Changes to this file may cause incorrect behavior and will be lost if
 //     the code is regenerated.
@@ -301,15 +301,6 @@
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to De faalkansbijdrage kan alleen bepaald worden als de norm van het traject groter is dan 0..
-        /// </summary>
-        public static string FailureMechanismContributionItem_Norm_must_be_larger_than_zero {
-            get {
-                return ResourceManager.GetString("FailureMechanismContributionItem_Norm_must_be_larger_than_zero", resourceCulture);
-            }
-        }
-        
-        /// <summary>
         ///   Looks up a localized string similar to Vak moet minstens uit één punt bestaan..
         /// </summary>
         public static string FailureMechanismSection_Section_must_have_at_least_1_geometry_point {
Index: Ringtoets/Common/src/Ringtoets.Common.Data/Properties/Resources.resx
===================================================================
diff -u -rba3865a26a9d4893855dd528ea1ad804d1cdae61 -r0a5a1c7fad7e52c152e3ff34eebcccf7785b377d
--- Ringtoets/Common/src/Ringtoets.Common.Data/Properties/Resources.resx	(.../Resources.resx)	(revision ba3865a26a9d4893855dd528ea1ad804d1cdae61)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/Properties/Resources.resx	(.../Resources.resx)	(revision 0a5a1c7fad7e52c152e3ff34eebcccf7785b377d)
@@ -135,9 +135,6 @@
   <data name="FailureMechanismContributionItem_Can_not_create_contribution_item_without_failure_mechanism" xml:space="preserve">
     <value>Kan geen bijdrage element maken zonder een toetsspoor.</value>
   </data>
-  <data name="FailureMechanismContributionItem_Norm_must_be_larger_than_zero" xml:space="preserve">
-    <value>De faalkansbijdrage kan alleen bepaald worden als de norm van het traject groter is dan 0.</value>
-  </data>
   <data name="FailureMechanismContribution_UpdateContributions_Can_not_create_FailureMechanismContribution_without_FailureMechanism_collection" xml:space="preserve">
     <value>Kan geen bijdrageoverzicht maken zonder toetsspoor.</value>
   </data>
Index: Ringtoets/Common/test/Ringtoets.Common.Data.Test/Contribution/FailureMechanismContributionTest.cs
===================================================================
diff -u -r2ff2a985fe9015df6da49fe43006e5c7631434c3 -r0a5a1c7fad7e52c152e3ff34eebcccf7785b377d
--- Ringtoets/Common/test/Ringtoets.Common.Data.Test/Contribution/FailureMechanismContributionTest.cs	(.../FailureMechanismContributionTest.cs)	(revision 2ff2a985fe9015df6da49fe43006e5c7631434c3)
+++ Ringtoets/Common/test/Ringtoets.Common.Data.Test/Contribution/FailureMechanismContributionTest.cs	(.../FailureMechanismContributionTest.cs)	(revision 0a5a1c7fad7e52c152e3ff34eebcccf7785b377d)
@@ -90,7 +90,7 @@
             TestDelegate test = () => new FailureMechanismContribution(Enumerable.Empty<IFailureMechanism>(), contribution, norm);
 
             // Assert
-            const string expectedMessage = "De faalkansbijdrage kan alleen bepaald worden als de norm van het traject groter is dan 0.";
+            const string expectedMessage = "Kans moet in het bereik [0, 1] liggen.";
             TestHelper.AssertThrowsArgumentExceptionAndTestMessage<ArgumentOutOfRangeException>(test, expectedMessage);
         }
 
@@ -332,6 +332,24 @@
         }
 
         [Test]
+        public void Norm_InvalidNewNorm_ThrowsArgumentOutOfRangeException(
+            [Values(150, 1e+6, -1e-6, -150, double.NaN)] double newNorm)
+        {
+            // Setup
+            var random = new Random(21);
+            var contribution = random.Next(1, 100);
+            var norm = random.NextDouble();
+            var failureMechanismContribution = new FailureMechanismContribution(Enumerable.Empty<IFailureMechanism>(), contribution, norm);
+
+            // Call
+            TestDelegate test = () => failureMechanismContribution.Norm = newNorm;
+
+            // Assert
+            const string expectedMessage = "Kans moet in het bereik [0, 1] liggen.";
+            TestHelper.AssertThrowsArgumentExceptionAndTestMessage<ArgumentOutOfRangeException>(test, expectedMessage);
+        }
+
+        [Test]
         public void Norm_WhenUpdated_NormUpdatedForEachFailureMechanismContributionItem()
         {
             // Setup
Index: Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/ReferenceLineMetaImporter/ShapeFileWithInvalidNormValue/ShapeFileWithInvalidNormValue.dbf
===================================================================
diff -u -r50b203a8d5c805fc548fb6b92c70a847190da6a5 -r0a5a1c7fad7e52c152e3ff34eebcccf7785b377d
Binary files differ
Fisheye: Tag 0a5a1c7fad7e52c152e3ff34eebcccf7785b377d refers to a dead (removed) revision in file `Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/ReferenceLineMetaImporter/ShapeFileWithInvalidNormValue/ShapeFileWithInvalidNormValue.prj'.
Fisheye: No comparison available.  Pass `N' to diff?
Fisheye: Tag 0a5a1c7fad7e52c152e3ff34eebcccf7785b377d refers to a dead (removed) revision in file `Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/ReferenceLineMetaImporter/ShapeFileWithInvalidNormValue/ShapeFileWithInvalidNormValue.qpj'.
Fisheye: No comparison available.  Pass `N' to diff?
Index: Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/ReferenceLineMetaImporter/ShapeFileWithInvalidNormValue/ShapeFileWithInvalidNormValue.shp
===================================================================
diff -u -r50b203a8d5c805fc548fb6b92c70a847190da6a5 -r0a5a1c7fad7e52c152e3ff34eebcccf7785b377d
Binary files differ
Index: Ringtoets/Common/test/Ringtoets.Common.IO.Test/test-data/ReferenceLineMetaImporter/ShapeFileWithInvalidNormValue/ShapeFileWithInvalidNormValue.shx
===================================================================
diff -u -r50b203a8d5c805fc548fb6b92c70a847190da6a5 -r0a5a1c7fad7e52c152e3ff34eebcccf7785b377d
Binary files differ
Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/FailureMechanismContributionNormChangeHandler.cs
===================================================================
diff -u -r2ff2a985fe9015df6da49fe43006e5c7631434c3 -r0a5a1c7fad7e52c152e3ff34eebcccf7785b377d
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/FailureMechanismContributionNormChangeHandler.cs	(.../FailureMechanismContributionNormChangeHandler.cs)	(revision 2ff2a985fe9015df6da49fe43006e5c7631434c3)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Handlers/FailureMechanismContributionNormChangeHandler.cs	(.../FailureMechanismContributionNormChangeHandler.cs)	(revision 0a5a1c7fad7e52c152e3ff34eebcccf7785b377d)
@@ -93,8 +93,8 @@
                                                                                                                    .OfType<GrassCoverErosionOutwardsFailureMechanism>()
                                                                                                                    .First();
 
-            IEnumerable<IObservable> hydraulicBoundaryLocationAffected = RingtoetsDataSynchronizationService.ClearHydraulicBoundaryLocationOutput(assessmentSection.HydraulicBoundaryDatabase,
-                                                                                                                                                  grassCoverErosionOutwardsFailureMechanism);
+            IEnumerable<IObservable> hydraulicBoundaryLocationAffected = RingtoetsDataSynchronizationService.ClearHydraulicBoundaryLocationOutput(
+                assessmentSection.HydraulicBoundaryDatabase, grassCoverErosionOutwardsFailureMechanism);
             if (hydraulicBoundaryLocationAffected.Any())
             {
                 log.Info(Resources.FailureMechanismContributionNormChangeHandler_Waveheight_and_design_water_level_results_cleared);
Index: Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/Handlers/FailureMechanismContributionNormChangeHandlerTest.cs
===================================================================
diff -u -r2ff2a985fe9015df6da49fe43006e5c7631434c3 -r0a5a1c7fad7e52c152e3ff34eebcccf7785b377d
--- Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/Handlers/FailureMechanismContributionNormChangeHandlerTest.cs	(.../FailureMechanismContributionNormChangeHandlerTest.cs)	(revision 2ff2a985fe9015df6da49fe43006e5c7631434c3)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/Handlers/FailureMechanismContributionNormChangeHandlerTest.cs	(.../FailureMechanismContributionNormChangeHandlerTest.cs)	(revision 0a5a1c7fad7e52c152e3ff34eebcccf7785b377d)
@@ -141,7 +141,7 @@
             TestDelegate call = () => handler.ChangeNorm(assessmentSection, invalidNorm);
 
             // Assert
-            const string expectedMessage = "De faalkansbijdrage kan alleen bepaald worden als de norm van het traject groter is dan 0.";
+            const string expectedMessage = "Kans moet in het bereik [0, 1] liggen.";
             TestHelper.AssertThrowsArgumentExceptionAndTestMessage<ArgumentOutOfRangeException>(call, expectedMessage);
         }
 
@@ -205,7 +205,7 @@
 
             // Precondition
             CollectionAssert.IsEmpty(section.GetFailureMechanisms().SelectMany(fm => fm.Calculations).Where(c => c.HasOutput));
-            
+
             var handler = new FailureMechanismContributionNormChangeHandler();
 
             IEnumerable<IObservable> affectedObjects = null;