Not all states have the same rules.
Not related to MS ball but this was a lesson we learned at the All-Star World Series where the GA USSSA rules differ from AL rules in that you can't have TB players on an all-star team but apparently in AL you can - and for some reason we had to play by AL rules since the World Series was in AL. Turns out a number of girls on the team that beat us were playing on a B team (where our rules state you can play only on a C team).