Sometimes they are. A lot of what I experienced was that they really weren't made to do that in the adjacent city and thought I was overstepping my authority.
We had a lot of people approach senior management and elected officials with the "Why can I build in <city>, but I have all this trouble building here", so we coached them on their response: "Because the people who live here both expect and deserve safe and health buildings built to code. If you can't build those, maybe you should only take work in <city> where it sounds like they are less concerned about that."