Cary, you are correct - the "annual for outlets" is a facility specific item, not mandated anywhere.
Nor does anyone, anywhere, talk to intentional abandonment of a system.
So I agree with Don that removal is the "Right" answer. There are so many problems that hidden outlets raise which can't really be answered (leakage, decay with time, backflow/contamination if the valve is closed and the pressure leaks away, opening by the curious/malicious, misuse)
That is the advice I would give the facility.