there are lots of places(?) that don't adopt/enforce codeds, but it is less common. i recently relocated from vermont to texas, in vermont there were 5 "local jurisictions" that looked at residential work, all "small cities (40,000) or less. that's the population. very rural, and independant. the state regulates public buildings, but when it comes to private residential the sentiment is " i don't want some a@#hole from the capital down in montpelier trying to tell me what to do on my own property". legislature is hard to move there,for years we tried to change the electrical licensing rules to make it a requirement that only licensed electricians could wire houses, it' never leaves committee. you wind up with licensed guys competing with any old handyman for work, hang a level in the back window of you're truck and you're in business. you wind up with a mess. if you don't have the right selling points, the fiqures (fire deaths, insurance savings, importance with respect to safety, child safety etc, ) it may not happen. then, there are places where they've had codes for 30 years, but no real inspectors, so you get c#@P work and installations, it takes time