I just read the other day that the NCAA still has the rule about alumni not being allowed to recruit athletes for their school. How they will enforce it is a question that needs to be answered.
As it relates to NIL, they won't be able to, in a lot of cases. It's important to note that NIL, is also illegal to use as a recruiting tool. So what this means is that a school can't be explicit with "if you sign here we will give you a $100,000 deal with Briggs Auto," a quid pro quo. The problem for the NCAA is that 28 states have already passed NIL legislation, many of those NIL laws allow the schools to go much further than their rules do. By the way, the only states with P5 schools without NIL legislation are Washington, Utah, Kansas, Iowa, Minnesota, Wisconsin, West Virginia, New York, and Virginia, so they really can't enforce something that's allowed at some member schools but not at others. I mean they could but they'd get sued and would definitely lose.
The issue the NCAA has is that they definitely need to address the issue of alumni participating in recruiting, because if there aren't guardrails, schools and alumni will definitely go too far. The problem for them is that these state laws have made it difficult for this to ever happen.