guilty of such an offence by the court trying an election petition or on the grounds of his or her  being in lawful custody at the date of the election, be  entitled so to vote in that constituency in  accordance with the provisions made by or under a law in that behalf; and no other person may so  vote.  (1) The seat of an Elected Member or a Specially Elected Member  of the National  Assembly shall become vacant -  (2) If circumstances such as are ref erred to in paragraph ( c ) of the preceding subsection  arise in relation to a Member of the Assembly by virtue of the fact that he or she is declared  insolvent, adjudged to be of unsound mind, sentenced to death or imprisonment, or convicted of  an election offence and it is open to the Member to appeal against the decision (either with the  leave of the court or other authority or without such leave), he or she shall forthwith cease to  perform his or her functions as a Member of the Assembly but, subject to t he next following  subsection, he or she shall not vacate his or her seat until the expiration of a period of 30 days  thereafter:  Provided that the Speaker may, at the request of the Member, from time to time extend  that period for further periods of 30 da ys to enable the Member to pursue an appeal against the  decision, so, however, that extensions of time exceeding in the aggregate 150 days shall not be  given without the approval of the Assembly signified by resolution. (3) If, on the determination of anyappeal, such circumstances continue to exist and no  further appeal is open to the Member of the Assembly, or if, by reason of the expiration of any  period for entering an appeal or notice thereof or the refusal of leave to appeal or for any other  reason,it ceases to be open to the Member to appeal, he or she shall forthwith vacate his or her  seat.  (4) If at any time before the Member of the Assembly vacates his or her seat such  circumstances as aforesaid cease to exist, his or her seat shall not become v acant by reason of  those circumstances, and he or she may resume the performance of his or her functions as a  Member of the Assembly. (1) The High Court shall have jurisdict ion to hear and determine any question whether -  (2) Any question whether any person has been validly elected as a Specially Elected  Member of the National Assembly or whether the seat of any such Member has become vacant  shall be determined bythe Speaker.  (3) Parliament may make provision with respect to -  69.  Determination of questions as to membership of National Assembly  68.  Tenure of office of Members  ( a )  upon the dissolution of Parliament; ( b )  if he or she is absent from the sittings of the Assembly for such period and in such  circumstances as may be prescribed in the rules of procedure of the Assembly; ( c )  subject to the provisions of subsections (2) to (3) of this section, if any circumstances  arise that, if he or she were not a Member of the Assembly, would cause him or her to be  disqualified for election thereto. ( a )  any person has been validly elected as an Elected Member of the National Assembly or  the seat of any such Member has become vacant; ( b )  any person has been validly elected as Speaker of the Assembly or,  having been so  elected, has vacated the office of Speaker. ( a )  the persons who may apply to the High Court for the determination of any question under  this section;  ( b )  the circumstances and manner in which the conditions upon which any such appli cation  may be made; and  ( c )  the powers, practice and procedure of the High Court in relation to any such application. Copyright Government of Botswana 25. Staff  26. Class-child ratio 