10 U.S.C. § 887b: Art. 87b. Offenses against correctional custody and restriction

who is placed in correctional custody by a person authorized to do so; who, while in correctional custody, is under physical restraint; and who escapes from the physical restraint before being released from the physical restraint by proper authority; who is placed in correctional custody by a person authorized to do so; who, while in correctional custody, is under restraint other than physical restraint; and who goes beyond the limits of the restraint before being released from the correctional custody or relieved of the restraint by proper authority; who is ordered to be restricted to certain limits by a person authorized to do so; and who, with knowledge of the limits of the restriction, goes beyond those limits before being released by proper authority;