Constitution of Zambia (Amendment) [No. 2 of 2016 113 (e) a reference to an office, body or organisation, where that office, body or organisation has ceased to exist, is a reference to its successor or to the equivalent office, body or organisation performing the functions. (4) A provision of this Constitution to the effect that a person, an authority or institution is not subject to the direction or control of a person or an authority in the performance of a function, does not preclude a court from exercising jurisdiction in relation to a question as to whether that person, authority or institution has performed the function in accordance with this Constitution or other laws. 268. In this Constitution, unless the context otherwise requires— Grammatical variation (a) a word in the singular includes the plural and a word in the plural includes the singular; and (b) a word or expression defined, shall be read with any grammatical variation or similar expression of that word or expression. 269. For the purposes of this Constitution, in computing time, unless a contrary intention is expressed— (a) a period of days from the happening of an event or the doing of an act shall be considered to be exclusive of the day on which the event happens or the act is done; (b) if the last day of the period is a Saturday, Sunday or public holiday (“excluded day”), the period shall include the next day; (c) where an act or a proceeding is directed or allowed to be done or taken on a specified day and that day is an excluded day, the act or proceeding shall be considered as done or taken in due time if it is done or taken the next day; and (d) where an act or a proceeding is directed or allowed to be done or taken within a time not exceeding six days, an excluded day shall not be counted in the computation of the time. Computation of time