Any nonprofit corporation founded in Virginia in 1913 that currently organizes and governs interscholastic activities among the public high schools shall develop, implement, and enforce rules requiring that a student who is a member of a school athletic team be ineligible for two school years to compete in interscholastic athletic competition, if it has been determined by the school principal and division superintendent that the student used anabolic steroids during the training period immediately preceding or during the sport season of the athletic team, unless such steroid was prescribed by a licensed physician for a medical condition.