25. Staff  26. Class-child ratio  ( a )  is, by virtue of his or her own act, under any acknowledgement of allegiance, obedience  or adherence to a foreign power or state; ( b )  has been declaredinsolvent or adjudged or otherwise declared bankrupt under any law  in force in any part of the Commonwealth or any country with a comparable legal system  and has not been discharged, or has made a composition with his or her creditors and  has not paid hisor her debts in full;  ( c )  is certified insane or otherwise adjudged or declared to be of unsound mind under any  law for the time being in force in Botswana; ( d )  subject to such exceptions as may be prescribed by Parliament, holds any public office,  or is acting in any public office by virtue of a contract of service expressed to continue for  a period exceeding six months; ( e )  is under sentence of death imposed on him or her by a court in any part of the  Commonwealth or any country with a comparable lega l system, or is under a sentence of  imprisonment (by whatever name called) exceeding six months imposed on him or her  by such a court or substituted by a competent authority for some other sentence imposed  on him or her by such a court; ( f )  holds, or is acting in,any office the functions of which involve any responsibility for, or in  connection with, the conduct of any elections to the National Assembly or the compilation  or revision of any electoral register for the purposes of such elections; or ( g )  is disqualified for election to the National Assembly by virtue of provision made in  pursuance of section 62 (2) of this Constitution. ( a )  upon expiration of a period of five years  from the date upon which he or she takes the  oath of allegiance under section 80 of this Constitution; ( b )  if, having been designated or selected to the  Ntlo ya Dikgosi  as such, he or she ceases to  be a person for the time being performing the functions o f the office of  Kgosi ;  ( c )  if he or she ceases to be qualified for membership of the  Ntlo ya Dikgosi  in terms of  section 79;  ( d )  if he or she participates in party politics; or ( e )  upon the dissolution of Parliament, (3) For the purposes of this section, two or more terms of imprisonment that are required to  be served consecutively shallbe regarded as a single term of imprisonment for the aggregate  period of those terms, and no account shall be taken of a sentence of imprisonment imposed as  an alternative to or in default of the payment of a fine. (4) A Member of the  Ntlo ya Dikgosi  shall not, while he or she is such a Member,  participate in party politics, but active participation in politics prior to being a Member of the  Ntlo ya  Dikgosi  shall not bar any person from being such a Member. Every Memberof the  Ntlo ya Dikgosi  shall, before taking his or her seat therein, take and  subscribe before the  Ntlo ya Dikgosi  the oath of allegiance.  80.  Oath of allegiance  whichever occurs first. (2) A member of the  Ntlo ya Dikgosi  shall be eligible for reselection, redesignation or  reappointment, as the case may be, to the  Ntlo ya Dikgosi .  83.  Rules of Procedure of  Ntlo ya Dikgosi 81.  Secretary to  Ntlo ya Dikgosi There shall be a Secretary to the  Ntlo ya Dikgosi  whose office shallbe an office in the  public service.  Copyright Government of Botswana 82.  Tenure of office of Members of  Ntlo ya Dikgosi (1) A Member of the  Ntlo ya Dikgosi shall vacate his or her seat in the  Ntlo ya Dikgosi — 