Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/DuneErosionFailureMechanismExtensions.cs
===================================================================
diff -u -rf4f041e353f89e0e93a4243968acee599b2186a7 -rb4ed912781c24bc513aa9898d3a50ee68b6f8179
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/DuneErosionFailureMechanismExtensions.cs	(.../DuneErosionFailureMechanismExtensions.cs)	(revision f4f041e353f89e0e93a4243968acee599b2186a7)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/DuneErosionFailureMechanismExtensions.cs	(.../DuneErosionFailureMechanismExtensions.cs)	(revision b4ed912781c24bc513aa9898d3a50ee68b6f8179)
@@ -20,7 +20,6 @@
 // All rights reserved.
 
 using System;
-using Ringtoets.Common.Data.AssessmentSection;
 
 namespace Ringtoets.DuneErosion.Data
 {
@@ -33,25 +32,19 @@
         /// Gets the norm which is needed in the calculations within <see cref="DuneErosionFailureMechanism"/>.
         /// </summary>
         /// <param name="failureMechanism">The <see cref="DuneErosionFailureMechanism"/> to get the failure mechanism norm for.</param>
-        /// <param name="assessmentSection">The <see cref="IAssessmentSection"/> which contains the assessment section norm.</param>
+        /// <param name="norm">The assessment section norm.</param>
         /// <returns>The value of the failure mechanism norm.</returns>
         /// <exception cref="ArgumentNullException">Thrown when any parameter is <c>null</c>.</exception>
         /// <exception cref="ArgumentException">Thrown when <paramref name="failureMechanism"/> has no (0) contribution.</exception>
-        public static double GetMechanismSpecificNorm(this DuneErosionFailureMechanism failureMechanism,
-                                                      IAssessmentSection assessmentSection)
+        public static double GetMechanismSpecificNorm(this DuneErosionFailureMechanism failureMechanism, double norm)
         {
             if (failureMechanism == null)
             {
                 throw new ArgumentNullException("failureMechanism");
             }
-            if (assessmentSection == null)
-            {
-                throw new ArgumentNullException("assessmentSection");
-            }
 
             return 2.15*(failureMechanism.Contribution/100)
-                   *assessmentSection.FailureMechanismContribution.Norm
-                   /failureMechanism.GeneralInput.N;
+                   *norm /failureMechanism.GeneralInput.N;
         }
     }
 }
\ No newline at end of file