We can't exactly just change them, but we can make more stringent requirements if we can show the justification and we register them with the appropriate state agency.I was licensed to practice architecture in California for twenty years (plus or minus). I surrendered my license when their continuing education requirements became too onerous. I was getting plenty of hours (needed to maintain my BO license in my home state), but California wouldn't grant credit for classes put on by my state government. I wasn't doing work in California, so I stopped renewing.
Apparently that was a good decision. IMHO, there's no point in adopting a state building code if every city and state agency can just change things around on a whim.