The credit language says "in", but could it mean "for". Temperature sensors in each zone makes sense, but I just read an article in ASHRAE journal completely trashing humidity sensors as being grossly inaccurate (+- 20%).

Surely humidity sensors only make sense where the humidity is controlled, i.e. at the central AHU? My collegues have never heard of humidity sensors in occupied spaces in offices.

Does this credit only make sense if one has terminal units that regulate humidity?

Don't forget that humidity in a locker room is expected and the thermal comfort expectation there (percentage dissatisfied) would adjust.