I exchanged emails with a friend who teaches at a New Jersey community college. He said that yes, they do have sports teams, but pointed out that their rules only permit full-time students to participate. It looks as if this new law only permits students who enroll part-time in CC classes to play for their HS team. And those who were seniors in 2020 are excluded--only the classes of 2021 and '22 are covered (which seems very strange). K9's suggestion that this benefits a bill sponsor's family member makes as much sense as any explanation I can think of.