231.—(1) The governor of every prison shall receive and confine, until discharged or delivered over in due course of law, all F367[military prisoners] sent to such prison in pursuance of this Act.

F368[(2) The governor of every prison shall also receive into his custody any person subject to military law in service custody upon delivery to the governor of a written order, purporting to be signed by the commanding officer of that person, for any period not exceeding 8 days (which shall not include the day on which the order is made), or any further such order or orders so made for any further such period or periods.]