The athletic training staff should be more than happy to take the protocol from the surgeon and run with it. One other thing to make sure of is you may communicate with the surgeon's office about HIPAA information and get things signed so they can send information to the staff at school.
Your son is going to have to provide quite a bit of documentation to the athletic training staff and their team physicians before that team physician will clear you to play. Ultimately the team physician at that school has the FINAL SAY and there is NOBODY who can override that.