NCAA guidelines (which may have changed in May), state and school laws.
If it is prohibited under Florida law or university rules, I don't think they could just ignore it and say "Hey, this guy could make or break our team... so we're doing it regardless of what the law says.
https://www.nilnetwork.com/nil-laws-by-state/
https://biz.opendorse.com/blog/nil-high-school/
NIL and the NCAA: What Are the Rules?
https://www.investopedia.com/nil-and-the-ncaa-8599762
Everything we know about NIL law & policy (so far)
https://splc.org/2023/02/everything-we-know-about-nil-law-policy-so-far/