101.—(1) The power of the Governor to impose a punishment under rule 100(1) (other than a caution) includes power to direct that the punishment shall not take effect unless, during such period of the prisoner’s sentence as shall be specified in the direction (not being more than 6 months (or 3 months in the case of an untried prisoner) from the date of the direction), the prisoner commits another breach of discipline and a direction is given under paragraph (2).
(2) Where a prisoner is found guilty of a breach of discipline committed during the period specified in a direction by the Governor under paragraph (1) then the Governor dealing with that breach may–
(a)direct that the suspended punishment shall take effect;
(b)reduce the period or the amount of the suspended punishment and direct that it shall take effect as so reduced;
(c)vary the original direction by substituting for the period specified a period expiring not later than six months from the date of variation; or
(d)give no direction with respect to the suspended punishment.