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In this Constitution and in any other law - (a) the power to appoint a person to hold or to act in an office in the public service shall include the power to confirm appointments, to exercise disciplinary control over persons holding or acting in any such office and to remove the persons from office; (b) where a power is conferred or a duty is imposed, the power may be exercised and the duty shall be performed, from time to time, as occasion requires; (c) where a power is given to a person or authority to do or enforce the doing of an act or a thing, all such powers shall be deemed to be also given as are necessary to enable that person or authority to do or enforce the doing of the act of thing; (d) where a power is conferred to make any constitutional or statutory instrument, regulation or rule or pass any resolution or give any direction, the power shall be construed as including the power, exercisable in the same manner, to amend or to revoke the constitutional or statutory instrument, regulation, rules or resolution or direction as the case may be; (e) words importing male persons include female persons and corporations. (f) words in the singular include the plural, and words in the plural include the singular; (g) where a word is defined, other parts of speech and tenses of that word have corresponding meanings; (h) words directing or empowering a public officer to do any act or thing, or otherwise applying to him by the designation of his office, include his successors in office and all his deputies and all other assistants; (i) words directing or empowering a Minister of State to do an act or a thing, or otherwise applying to him by the designation of his office, include a person acting for him, or if the office is vacant, a person designated to act in that office by or under the authority of an Act of Parliament and also his successors in office and all his deputies or other assistants; (j) where a power is conferred or a duty is imposed on the holder of an office as such, the power may be exercised and the duty shall be performed by the person for the time being charged with the performance of the functions of that office.