68 PART 5 LEGISLATIVE AND OTHER POWERS 6.15 Powers and functions of Senate and National Assembly (1) Except as provided in the Fifth Schedule, in the exercise of their legislative authority both the Senate and the National Assembly have power to initiate, prepare, consider or reject any legislation. (2) In addition to their functions under this Constitution, the Senate and the National Assembly may exercise any further functions conferred or imposed on them under any law. 6.16 Acts of Parliament and procedure for their enactment (1) Parliament’s legislative authority is exercised through the enactment of Acts of Parliament. (2) An Act of Parliament is a Bill which has been— (a) presented in and passed by both Houses of Parliament; and (b) assented to and signed by the President; in accordance with this Constitution. (3) The words of enactment in Acts of Parliament are ―Enacted by the Parliament and the President of Zimbabwe‖, or words to that effect. (4) The procedure to be followed by the National Assembly and the Senate with regard to Bills is set out in the Fifth Schedule. (5) After a Bill has been passed by both Houses in accordance with the Fifth Schedule, the President of the Senate or the Speaker, as the case may be, must without delay— (a) cause it to be presented to the President for assent and signature, together with any certificate which is required by this Constitution to accompany the Bill; and (b) give public notice of the date on which the Bill was sent to the President. (6) When a Bill is presented to the President for assent and signature, he or she must, within twenty-one days, either— (a) assent to it and sign it, and then cause it to be published in Gazette without delay; or (b) if he or she considers it to be unconstitutional or has any other reservations about it, refer the Bill back to Parliament through the Clerk of Parliament, together with detailed written reasons for those reservations and a request that the Bill be reconsidered at a joint sitting of the National Assembly and the Senate. (7) Where a Bill has been referred back to Parliament in terms of subsection (6)(b), the Speaker must without delay convene a sitting of the National Assembly, which must— (a) reconsider the Bill and fully accommodate the President’s reservations; or (b) pass the Bill, with or without amendments, by a two-thirds majority of the total membership of the National Assembly;