Act No.12 of 1995 Art.5 to ensure that he protects, strengthens and preserves the unity of the United Republic. (2) For the purposes of the provisions of subarticle (1), each of the principal leaders of the organs vested with executive powers of the United Republic shall, before assuming office in accordance with this Constitution, take oath to defend and preserve the unity of the United Republic in accordance with this Constitution. (3) The principal leaders to whom the provisions of this Article apply are: (a) the President of the United Republic; (b) the Vice-President of the United Republic; (c) the President of Zanzibar; and (d) the Prime Minister of the United Republic. PART II VICE-PRESIDENT Vice-President his duties and powers Act No.34 of 1994 Art.11; Act No.3 of 2000 Art.9 There shall be a Vice-President, who shall be the principal 47.-(1) assistant to the President in respect of all the matters in the United Republic generally and, in particular shall – (a) assist the President in making a follow-up on the day-to-day implementation of Union Matters; (b) perform all duties assigned to him by the President; and (c) perform all duties and functions of the office of President when the President is out of office or out of the country. (2) Without prejudice to the provisions of Article 37(5), the VicePresident shall be elected in the same election together with the President, after being nominated by his party at the same time as the Presidential candidate and being voted for together on the same ticket. When the Presidential candidate is elected the Vice-President shall have been elected. (3) A person shall be nominated to contest for the office of VicePresident on the basis of the principle that where the President of the Untied Republic hails from one part of the United Republic, then the Vice-President shall be a person who hails from the other part of the Union. (4) A person shall not be nominated to contest for the office of VicePresident of the United Republic, save only if ­ (a) he is a citizen of the United Republic by birth in accordance with the citizenship law; (b) he has attained the age of forty; (c) he is a member of, and a candidate nominated by, a political party; (d) he is qualified to be a Member of Parliament or a Member of the House of Representatives; and (e) within the period of five years before the elections he has not been convicted by any court for any offence relating to evasion to pay any tax due to the Government. (5) Any party shall not be prohibited from nominating any person to contest for the office of Vice-President for the reason only that such person is at 34