elections after the promulgation of this Constitution shall be held under the movement political system. (2) Two years before the expiry of the term of the first Parliament elected under this Constitution, any person shall be free to canvass for public support for a political system of his or her choice for purposes of a referendum. (3) During the last month of the fourth year of the term of Parliament referred to in clause (2) of this article, a referendum shall be held to determine the political system the people of Uganda wish to adopt. (4) article. Parliament shall enact laws to give effect to the provisions of this 273. Appointment to certain offices. The first appointments to the following offices shall be made within six months after the assumption of office of the first President elected in accordance with the provisions of this Constitution— (a) the chairperson and other members of the Uganda Human Rights commission; (b) the chairperson and other members of the Electoral Commission; (c) the Inspector General of Government and the Deputy Inspectors General; and (d) the chairperson, deputy chairperson and other members of the Judicial Service Commission. 274. Existing law. (1) Subject to the provisions of this article, the operation of the existing law after the coming into force of this Constitution shall not be affected by the coming into force of this Constitution but the existing law shall be construed with such modifications, adaptations, qualifications and exceptions as may be necessary to bring it into conformity with this Constitution. (2) For the purposes of this article, the expression “existing law” means the written and unwritten law of Uganda or any part of it as existed immediately before the coming into force of this Constitution, including any Act of Parliament or Statute or statutory instrument enacted or made before