53.—(1) Where a prisoner is to be charged with an offence against discipline, the charge shall be laid as soon as possible and, save in exceptional circumstances, within 48 hours of the discovery of the offence.
(2) Every charge shall be inquired into by the governor.
(3) Every charge shall be first inquired into not later, save in exceptional circumstances, than the next day, not being a Sunday or public holiday, after it is laid.
(4) A prisoner who is to be charged with an offence against discipline may be kept apart from other prisoners pending the governor’s first inquiry.