This is the problem with all local racing series. If they don’t follow national rules you can’t run the same vehicle elsewhere, and many do it on purpose because they are afraid of losing the local guy to another track or series. They are short-sighted and don’t realize how they can enhance their own track by supporting bigger races & series.
For instance, if the local guy wins regionally or nationally, more people will want to come to your track to race him on off weekends. Secondly, if they don’t win, you still get your tracks name out there.
Plus, if you host a regional race, it opens sponsorship opportunities because those visitors use local hotels, restaurants, etc.
However, if you don’t have common rules, your efforts are nothing but a waste of time.