Jeep Offers

Okay so as a fundraiser for my school’s orchestra program, we are selling $10 raffle tickets in which the grand prize is a car. One way for us to sell the tickets is at our varsity football games on friday nights by just walking around near the concession stands, entrances, etc.

I was wondering, Is there any rules prohibiting me from doing this at the school my cousin goes to during one of their varsity football games?

So long story short, my question is What are the laws/regulations about selling things at a varsity level high school football game?