I working in Pheonix in the industry. I am aware of codes requireing many structual elements of pool building, however some of the rules are insurance [homeowners] driven and then the local fire department will have rules written into mulicipality codes. So a code will vary city to city. I just refer the client to improve/upgrade to the bset safety standard common;y practiced. This is due to life/death condition. So I do not care what the local code is, I want to make the most safe recommendation.Terris