Bill, Florida used to be the same way. That is how I got my state inspector job. The state did not want to deal with a hundred different building codes when they designed and built something so they had their own state building department. Finally they passed a state building code that everyone needs to use, unaltered.
Now if we could just get the AHJs to interpret it the same way. The trades say they still have to do things
the "Cape Coral way" the "Lee County way" and the "Collier County way" etc. It is still a lot better than having 1000 AHJs writing amendments.
