be, otherwise than by reason of a dissolution of the Senate or the House of Representatives; or (b) when the House of which he was a member first sits after any dissolution of that House; or (c) if he is removed from office by a resolution of the Senate or of the House of Representatives, as the case may be, by the votes of not less than two-thirds majority of the members of that House. 51. There shall be a Clerk to the National Assembly and such other staff as may be prescribed by an Act of the National Assembly, and the method of appointment of the Clerk and other staff of the National Assembly shall be as prescribed by that tab B - Procedure for Summoning and Dissolution of National Assembly 52. (1) Every member of the Senate or the House of Representatives shall, before taking his seat, declare his assets and liabilities as prescribed in this Constitution and subsequently take and subscribe the Oath of Allegiance and the oath of membership as prescribed in the Seventh Schedule to this Constitution before the President of the Senate or, as the case may be, the Speaker of the House of Representatives, but a member may before taking the oaths take part in the election of a President and a Deputy President of the Senate, as the case may be, or a Speaker and a Deputy Speaker of the House of Representatives. (2) The President and Deputy President of the Senate and the Speaker and the Deputy Speaker of the House of Representatives shall declare their assets and liabilities as prescribed in this Constitution and subsequently take and subscribe the Oath of Allegiance and the oath of membership prescribed as aforesaid before the Clerk of the National Assembly. 53. (1) At any sitting of the National Assembly (a) in the case of the Senate, the President of the Senate shall preside, and in his absence the Deputy President shall preside; and (b) in the case of the House of Representatives, the Speaker of that House shall preside, and in his absence the Deputy Speaker shall preside. (2) At any joint sitting of the Senate and House of Representatives (a) the President of Senate shall preside, and in his absence the Speaker of the House of Representatives shall preside; and (b) in the absence of the persons mentioned in paragraph (a) of this subsection, the Deputy President of the Senate shall preside, and in his absence the Deputy Speaker of the House of Representatives shall preside. (3) In the absence of the persons mentioned in the foregoing provisions of this section, such member of the Senate or the House of Representatives or of the joint sitting, as the case may be, as the Senate or the House of Representatives or the joint sitting may elect for that purpose shall preside. 54. (1) The quorum of the Senate or of the House of Representatives shall be one-third of all the members on of the Legislative House concerned. (2) The quorum of a joint sitting of both the Senate or of the House of Representatives shall be one-third of all the members of both Houses.