Index: Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Plugin/GrassCoverErosionOutwardsPlugin.cs
===================================================================
diff -u -rf524b7c173a54c449e623613059c27a66672a3ba -rc7d35c31724fb469b38c6c3773d2e9aa1c38fdbb
--- Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Plugin/GrassCoverErosionOutwardsPlugin.cs	(.../GrassCoverErosionOutwardsPlugin.cs)	(revision f524b7c173a54c449e623613059c27a66672a3ba)
+++ Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Plugin/GrassCoverErosionOutwardsPlugin.cs	(.../GrassCoverErosionOutwardsPlugin.cs)	(revision c7d35c31724fb469b38c6c3773d2e9aa1c38fdbb)
@@ -535,15 +535,12 @@
                     }
 
                     IAssessmentSection assessmentSection = nodeData.AssessmentSection;
-                    GrassCoverErosionOutwardsFailureMechanism failureMechanism = nodeData.FailureMechanism;
 
-                    double mechanismSpecificNorm = GetFailureMechanismSpecificNorm(assessmentSection, failureMechanism);
-
                     hydraulicBoundaryLocationCalculationGuiService.CalculateDesignWaterLevels(
                         assessmentSection.HydraulicBoundaryDatabase.FilePath,
                         assessmentSection.HydraulicBoundaryDatabase.EffectivePreprocessorDirectory(),
                         nodeData.WrappedData,
-                        mechanismSpecificNorm,
+                        nodeData.GetNormFunc(),
                         new GrassCoverErosionOutwardsDesignWaterLevelCalculationMessageProvider());
                 });