In much the same situation, I just said NO. A protracted argument unfolded over the next few days until the matter was settled by me skimming a copy of the Cond

In much the same situation, I just said NO. A protracted argument unfolded over the next few days until the matter was settled by me skimming a copy of the Conditions Of Service booklet across the desk and saying, "Show me where it says I have to." Immediate manager was not happy, but it soon blew over.