Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationService.cs
===================================================================
diff -u -rc786273ba6460b0498c00ff70d1703eee74fadb8 -r16cb360eae0014270ebb6700054afdbbd565ae65
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationService.cs	(.../GrassCoverErosionInwardsCalculationService.cs)	(revision c786273ba6460b0498c00ff70d1703eee74fadb8)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationService.cs	(.../GrassCoverErosionInwardsCalculationService.cs)	(revision 16cb360eae0014270ebb6700054afdbbd565ae65)
@@ -60,7 +60,7 @@
         /// <param name="calculation">The <see cref="GrassCoverErosionInwardsCalculation"/> for which to validate the values.</param>
         /// <param name="assessmentSection">The <see cref="IAssessmentSection"/> for which to validate the values.</param>
         /// <returns><c>True</c>c> if <paramref name="calculation"/> has no validation errors; <c>False</c>c> otherwise.</returns>
-        public bool Validate(GrassCoverErosionInwardsCalculation calculation, IAssessmentSection assessmentSection)
+        public static bool Validate(GrassCoverErosionInwardsCalculation calculation, IAssessmentSection assessmentSection)
         {
             CalculationServiceHelper.LogValidationBeginTime(calculation.Name);