Section 155: Reconsideration of sentence of imprisonment

(1) A sentence of imprisonment passed by a court-martial may be reconsidered by the appropriate superior authority or by such officers (not below the rank of colonel or corresponding rank) as may, from time to time, be appointed by the President.
(2) If on a reconsideration, it appears that the conduct of the offender or accused since his conviction has been such as to justify remission of the sentence, whether in part or in whole, it may be so remitted.
(3) The power to reconsider a sentence may be exercised at any time after confirmation, and where, after review, a sentence remains effective, it shall be reconsidered at intervals of six months, provided that, delay in complying with this section shall not invalidate the sentence.