Article 47, Draft Constitution of India 1948
(1) No person shall be eligible for election as President unless he-
(a) Is a citizen of India,
(b) Has completed the age of thirty-five years, and
(c) Is qualified for election as a member of the House of the People.
(2) A person shall not be eligible for election as President if he holds any office or position of emolument under the Government of India or the Government of any State or under any local or other authority subject to the control of any of the said Governments.
Explanation.- For the purposes of this clause a person shall not be deemed to hold any office or position of emolument by reason only that-
(a) He is a minister either for India or for any State for the time being specified in Part I of the First Schedule; or
(b) He is a minister for any State for the time being specified in Part III of the First Schedule, if he is responsible to the Legislature of the State, or, where there are two Houses of the Legislature of the State, to the Lower House of the Legislature, and if not less than three-fourths of the members of the Legislature or House, as the case may be, are elected.