117 Resignations 257. (1) Save or as otherwise provided in this Constitution, any person who has been appointed to any office established by this Constitution may resign from that office by letter under his hand addressed to the person or authority by whom he was appointed, and the resignation shall take effect and the office shall accordingly become vacant ­ (a) at such time or on such date (if any) as may be specified in the writing or; (b) subject to subsection (2), when the letter is received by the person or authority to whom it is addressed or by such other person as may be authorised by that person or authority to receive it. (2) Any resignation referred to in subsection (1) may be withdrawn before becoming effective where the person or authority to whom the resignation is addressed consents to the withdrawal. Re-appointments and concurrent appointments 258. (1) Where any person has vacated any office established by this Constitution, he may, if qualified, again be appointed or elected to hold that office in accordance with the provisions of this Constitution. (2) Where a power is conferred by this Constitution upon any person to make any appointment to any office, a person may be appointed to that office notwithstanding that some other person may be holding that office, when that other person is on leave of absence pending the relinquishment of the office, and where two or more persons are holding the same office by reason of an appointment made in pursuance of this subsection, then, for the purposes of any function conferred upon the holder of that office, the person last appointed shall be deemed to be the sole holder of the office. Power to amend or revoke instruments etc 259. Where any power is conferred by this Constitution to make any order, regulation or rule, or to give any direction, the power shall be construed as including the power, exercisable in like manner, to amend or revoke any such order, regulation, rule or direction. Saving for jurisdiction of the High Court 260. A provision of this Constitution that a person or authority shall not be subject to the direction or control of any other person or authority in the exercise of any functions under this Constitution shall not be construed as precluding the High Court from exercising jurisdiction in relation to any question whether that person or authority has performed those functions in accordance with this Constitution or any other law or should not perform those functions. Interpretation 261. (1) In this Constitution unless the context otherwise requires – “Act of Parliament” means any law made by the King and Parliament; “chamber” means a house of Parliament; “the Commonwealth” means the countries that are independent members of the Commonwealth and territories for whose international relations any of those countries is wholly or in part responsible; 117