You can change the roster between competitions. That's fine, but is different from having the same student compete on two different teams in a season.Tailsfan101 wrote: My HS coach seems to think it's allowed, and she's very knowledgeable about SO. While soinc.org says teams may only compete in one Division at a school, my coach says that's per competition, and you can change the roster between competitions.
The national policy is here: https://www.soinc.org/start-team/team-size-grade-levels
It contains the statement "Any student can compete at only one Division level (either Division B or C, not both) at a single school."