Detention of pay shall be for a stated period of not more than one year but if the offender’s term of service expires earlier, the detention shall terminate upon that expiration. No two or more of the punishments of arrest in quarters, confinement on bread and water or diminished rations, correctional custody, extra duties, and restriction may be combined to run consecutively in the maximum amount imposable for each. (c) An officer in charge may impose upon enlisted members assigned to the unit of which he is in charge such of the punishments authorized under subsection as the Secretary concerned may specifically prescribe by regulation. (d) The officer who imposes the punishment authorized in subsection (b), or his successor in command, may, at any time, suspend probationally any part or amount of the unexecuted punishment imposed and may suspend