Yes, individual shower and tub-shower combination valves must conform to the requirements of either ASSE 1017/ASME A112.1016/CSA B125.16 or ASME A112.18.1/CSA B125.1. The corresponding Residential Code section P2708.4 does not currently mention the ASME A112.18.1 standard, but this will be corrected in the upcoming 8th Edition of the FBC, effective December 31, 2023.