diff --git a/PROMS/Volian.Controls.Library/EditItem.cs b/PROMS/Volian.Controls.Library/EditItem.cs
index d10d686c..3b694614 100644
--- a/PROMS/Volian.Controls.Library/EditItem.cs
+++ b/PROMS/Volian.Controls.Library/EditItem.cs
@@ -59,7 +59,7 @@ namespace Volian.Controls.Library
 			bool allow = (MyStepPanel.VwMode == E_ViewMode.Edit);
 			StepTabRibbon str = MyStepPanel.MyStepTabPanel.MyStepTabRibbon;
 			str.SiblingsButtonsEnabled = allow;
-			str.InsertButtonsEnabled = allow && !(MyItemInfo.IsProcedure || MyItemInfo.IsSection);
+			str.InsertButtonsEnabled = allow && !(MyItemInfo.IsProcedure || MyItemInfo.IsSection || MyItemInfo.IsRNOPart);
 			// do special case for cpystep button:  cannot copy an enhanced step:
 			if (MyItemInfo.IsEnhancedStep) str.SetCopyStepButton(false);
 		}