I never knew that either... not that I've ever made contact with potential recruits... it almost boarders an infringement of freedom of speech. "Sorry person X, you can't talk to person Y because he's going to play basketball in college." Unless fans are promising gifts or any sort of offering... which is completely different than saying "I'd be awesome if you came to our school"... then this is one of the most rediculous rules I've ever seen.
Plus you can't prove someone's a fan of a certain school anyway... I could go out and buy hawk gear and then post on some recruit's website and beg for them to join the hawks just to get them in trouble... even if they went and said... "but he goes to
ISU" I could claim that I really wanted to be a hawkeye but my parents said they wouldn't support me financially if I chose to throw away my life by going to school there... and thus I had no choice.
Point in case... you have no way of proving who is a fan of what school... so basically the rule as I understand it... is nobody but people involved in the recruiting process can talk to a recruit until they decide on a school. Better shut the kid off from friends and family as they are likely fans of different schools too... stupid rule.