(1) Sentence of imprisonment should normally be confined to sailors who have already undergone several sentences of detention without effect, and to other sailors who are also to be dismissed from service.
(2) Imprisonment may, however, be awarded in lieu of detention when there is no detention accommodation available in Naval Detention quarters in which case a note to that effect shall be made on the punishment warrant and on the Advancement and Conduct Record Sheet.
(3) Notwithstanding anything contained in sub-regulation (1) and (2) persons below the age of twenty-one shall not be summarily sentenced to imprisonment except for grave civil offences and (in such cases) detention may be awarded even though they have not to be retained in service.
(4) A sentence of Ninety days shall not be awarded if that period exceeds three calendar months.
(5) Detention shall not be awarded for a period of less than ten days.
(6) In addition to the consequential punishment provided in sub-regulation (9) of section 82 a sentence of imprisonment or detention shall carry with it deprivation of Good Conduct Medal and Badges.
(7) Whenever a sentence shall be passed by a Commanding Officer on an offender already under sentence of detention or imprisonment under these regulations for former offence, the Commanding officer may award sentence of detention or imprisonment for the offence, for which he is under trial, to commence at the expiration of the sentence of detention or imprisonment to which he has been previously sentenced;
Provided that so much of any term of detention or imprisonment awarded to a person in pursuance of this sub-regulation as will prolong the total term of detention or imprisonment beyond the maximum period of three months as specified in sub-regulation (1) of regulation 13, shall be deemed to be remitted.