(5)Where a prisoner has been punished during any month, then if he is punished for bad conduct or for any violation in relation to his work which in the opinion of the Superintendent was a minor one, the monthly remission for good conduct or for work shall be reduced up to three days; but if the misconduct or any such violation in the opinion of the Superintendent was of a serious nature, the prisoner shall not be entitled to any remission for good conduct, or as the case may be, for work, for that month. The Superintendent shall record his reasons in writing for deciding misconduct or violation in relation to work as of a minor or serious nature.