It is required that University of Michigan students and all Rec Sports members prove their membership by presenting a valid M-Card tohe Entrance Monitor to enter the facilities. Rec Sports is fully authorized to deny entrance to its facilities without possession of a valid M-Card. If the system does not validate the M-Card, the cardholder will not be admitted. If the cardholder believes the rejected M-Card should be accepted, they may check with the Main Office personnel.