24 No. 2 of 2016] (6) Constitution of Zambia (Amendment) A Member of Parliament who intends to challenge a statutory instrument, on its constitutionality, shall follow the procedure laid down in the Standing Orders of the National Assembly. Elections to National Assembly and Members of Parliament Election and composition of National Assembly 68. (1) A Member of Parliament shall be elected in accordance with Article 47 (2) and this Article. (2) The National Assembly shall consist of— (a) one hundred and fifty-six members directly elected on the basis of a simple majority vote under the first-pastthe-post system; (b) not more than eight nominated members; (c) the Vice-President; (d) the Speaker; and (e) the First and Second Deputy Speakers. Nominated Members of Parliament 69. (1) The President may nominate a person referred to in Article 68 (2) (b) where the President considers it necessary to enhance the representation of special interests, skills or gender in the National Assembly. (2) A person may be nominated as a Member of Parliament if the person qualifies to be elected as such under Article 70. (3) A person who was a candidate for election in the last preceding general election or a subsequent by-election is not eligible to be nominated as a Member of Parliament Qualifications and disqualifications of Members of Parliament 70. (1) Subject to clause (2), a person is eligible to be elected as a Member of Parliament, if that person— (a) is a citizen; (b) is at least twenty-one years old; (c) is a registered voter;