Limit Line Manager access on Change Assignment Page in Redwood

Summary:

Our implementer created two business rules in express mode in VBS to prevent Line Manager from making any changes on the Change Assignment Redwood pages. The same rule works through auto complete rules in Responsive UI. However, the rules seem to cause the Redwood page to freeze intermittently. What is the best way to restrict what the Line Manager can do on the Redwood Change Assignment page? They should only be able to request a salary change.

NOTE: We cannot have Line Managers do this action in the Change Salary page due to a change assignment row needing to be created for the salary change for an interface.