(4) Subject to the provisions of this Constitution, the functions conferred on the President by clause (1) of this article may be exercised by the President either directly or through officers subordinate to the President. (5) A statutory instrument or other instrument issued by the President or any person authorised by the President may be authenticated by the signature of a Minister; and the validity of any instrument so authenticated shall not be called in question on the ground that it is not made, issued or executed by the President. 100. Notification of the absence of the President from Uganda. The President shall, whenever leaving Uganda, notify in writing the Vice President, the Speaker and the Chief Justice. 101. Presidential addresses. (1) The President shall, at the beginning of each session of Parliament, deliver to Parliament an address on the state of the nation. (2) The President may, also, in consultation with the Speaker, address Parliament from time to time, on any matter of national importance. 102. Qualifications of the President. A person is not qualified for election as President unless that person is— (a) a citizen of Uganda by birth; (b) not less than thirty-five years and not more than seventy-five years of age; and (c) a person qualified to be a member of Parliament. 103. Election of the President. (1) The election of the President shall be by universal adult suffrage through a secret ballot. (2) unless— (a) A person shall not be a candidate in a presidential election that person submits to the Electoral Commission on or before the day appointed as nomination day in relation to the election, a document which is signed by that person nominating him or her