25. Staff  26. Class-child ratio  (1) Any person who is appointed or elected to any office established by this Constitution  may resign from that office by writing under his or her hand  addressed to the person or authority  by whom he or she was appointed or elected: Provided that in the case of a person who holds office as President his or her resignation  from that office shall be addressed to the Chief Justice, in the case of a person w ho holds office as  Speaker or Deputy Speaker of the National Assembly his or her resignation from that office shall  be addressed to the Assembly, in the case of an Elected or Specially Elected Member of the  Assembly his or her resignation shall be addresse d to the Speaker, and in the case of a Member  of the  Ntlo ya Dikgosi  his or her resignation from that office shall be addressed to the Chairman of  the  Ntlo ya Dikgosi .  (2) The resignation of any person from any office established by this Constitution  shall  take effect on the date or at the time indicated in the writing signifying the resignation or, if no such  date or time is so indicated, at the time the writing is received by the person or authority to whom  it is addressed or by any person authorized  by that person or authority to receive it. (1) Where any person has vacated any office established by this Constitution, he or she  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 maybe 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 purpos es 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. (1) In this Constitution unless the context otherwise requires -  "the Assembly"  means the National Assembly;  "Botswana"  means the territory that, on 29th September, 1966, was comprised in the  former Protectorate of Bechuanaland; "financial year"  means the period of 12 months ending on 31st March in any year or on  such other day as Parliament may prescribe;  "the  Gazette "  means the Botswana  GovernmentGazette ;  "high judicial office"  means the office of a judge of a court of unlimited jurisdiction in civil  and criminal matters in Botswana, a Commonwealth country or in any country outsid e the  Commonwealth that may be prescribed by Parliament or the office of judge of a court having  jurisdiction in appeals from such a court; ''Kgosana'' (pl. Dikgosana)  means Headman;  ''Kgosi'' (pl. Dikgosi)  means Chief or Sub-Chief as defined in the Bogosi Act;  "oath"  includes affirmation; "the oath of allegiance"  means such oath of allegiance as may be prescribed by law; "public office"  means, subject to the provisions of subsections (2) and (3) of this section,  an office of emolument in the public service; "public officer"  means a person holding or acting in any public office; "the public service"  means the civil service of the Government; Copyright Government of Botswana 127. Interpretation  126. Reappointments and concurrent appointments  125. Resignations CHAPTER IX  Miscellaneous  (ss 125-127)