70 6.19 Subsidiary legislation Parliament may, in an Act of Parliament, delegate power to make statutory instruments within the scope of and for the purposes laid out in that Act, but— (a) Parliament’s primary law-making power must not be delegated; (b) statutory instruments must not infringe or limit any of the rights and freedoms set out in the Declaration of Rights; (c) statutory instruments must be consistent with the Act of Parliament under which they are made; (d) the Act must specify the limits of the power, the nature and scope of the statutory instrument that may be made, and the principles and standards applicable to the statutory instrument; (e) statutory instruments do not have the force of law unless they have been published in the Gazette; and (f) statutory instruments must be laid before the National Assembly in accordance with its Standing Orders and submitted to the Parliamentary Legal Committee for scrutiny. PART 6 PROCEDURE IN PARLIAMENT 6.20 Head of Parliament (1) The Speaker is the head of Parliament and responsible for its day-to-day administration, subject to any instructions given by the Committee on Standing Rules and Orders. (2) The President of the Senate is the deputy head of Parliament and acts as head whenever the Speaker is for any reason unable to do so. 6.21 Persons presiding in Parliament (1) The person presiding at any sitting of the Senate must be— (a) the President of the Senate or, in his or her absence, the Deputy President of the Senate; or (b) in the absence of the President or Deputy President of the Senate, a Senator elected for the purpose by the Senate, but that Senator must not be a Minister, Deputy Minister or Provincial Governor. (2) The person presiding at any sitting of the National Assembly must be— (a) the Speaker or, in his or her absence, the Deputy Speaker; or (b) in the absence of the Speaker or Deputy Speaker, a member of the National Assembly elected for the purpose by the National Assembly, but that member must not be a Minister or Deputy Minister. (3) The Speaker, or in his or her absence the President of the Senate, must preside at any joint sitting of the National Assembly and the Senate.