Fair or unfair?

Does anyne know if there are rules for practicing off season from OFSAA basketball. When I played our coach always said we couldn't start practicing yet because it's against the rules. And now that I am coaching my school doesn't allow me to have gym time for boys basketball until it's in season. If it's during the offseason I am only permitted to use the gym at 5-6pm due to the gym being used for the girls season. Is it fair that some schools get to practice during prime time during the offseason? While others have to wait until 2 weeks before the season starts to begin their practices? I am interested to hear some opinions. Thank you