Index: Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Service/GrassCoverErosionOutwardsWaveConditionsCalculationService.cs
===================================================================
diff -u -re69acb9595f7bf1d202ddd1fb51934b66768b75d -r16cb360eae0014270ebb6700054afdbbd565ae65
--- Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Service/GrassCoverErosionOutwardsWaveConditionsCalculationService.cs	(.../GrassCoverErosionOutwardsWaveConditionsCalculationService.cs)	(revision e69acb9595f7bf1d202ddd1fb51934b66768b75d)
+++ Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Service/GrassCoverErosionOutwardsWaveConditionsCalculationService.cs	(.../GrassCoverErosionOutwardsWaveConditionsCalculationService.cs)	(revision 16cb360eae0014270ebb6700054afdbbd565ae65)
@@ -41,7 +41,7 @@
         /// <param name="calculation">The <see cref="GrassCoverErosionOutwardsWaveConditionsCalculation"/> for which to validate the values.</param>
         /// <param name="hydraulicBoundaryDatabaseFilePath">The file path of the hydraulic boundary database file which to validate.</param>
         /// <returns><c>True</c>c> if there were no validation errors; <c>False</c>c> otherwise.</returns>
-        public bool Validate(GrassCoverErosionOutwardsWaveConditionsCalculation calculation, string hydraulicBoundaryDatabaseFilePath)
+        public static bool Validate(GrassCoverErosionOutwardsWaveConditionsCalculation calculation, string hydraulicBoundaryDatabaseFilePath)
         {
             return ValidateWaveConditionsInput(
                 calculation.InputParameters,