Push it out into the living room until he leaves
Actually, this is a relatively practical solution.
However, the following is more what I expected to hear from the pros on this forum:
1) Ask him what code section he is getting this requirement from.
2) Check his reference carefully. If he's correct, think about Mr. Fretwell's suggestion.
3) If you don't believe the code supports him here, take him the reference and play nice: "Gee, sir, I still don't understand. Could you please explain..."
Or you could try KP8.
Back in my manufacturing days, I attended an Interaction Management seminar that emphasized dealing with others through "key points." KP1, KP2, KP3.
One of my co-workers suggested KP8: 'Hit him in the head with a two-by-four.'