Article 58 of Constitution of India "Qualifications for election as President"
(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 of profit under the 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 Article, a person shall not be deemed to hold any office of profit by reason only that he is the President or Vice President of the Union or the Governor of any State or is a Minister either for the Union or for any State.
Article 59 of Constitution of India "Conditions of President's office"
(1) The President shall not be a member of either House of
Parliament or of a House of the Legislature of any State,
and if a member of either House of Parliament or of a House
of the Legislature of any State be elected President, he
shall be deemed to have vacated his seat in that House on
the date on which he enters upon his office as President.
(2) The President shall not hold any other office of profit.
(3) The President shall be entitled without payment of rent
to the use of his official residences and shall be also
entitled to such emoluments, allowances and privileges as
may be determined by Parliament by law and, until provision
in that behalf is so made, such emoluments, allowances and
privileges as are specified in the Second Schedule.
(4) The emoluments and allowances of the President shall to
be diminished during his term of office.
Article 60 of Constitution of India "Oath or affirmation by the President"
Every President and every person acting as President or
discharging the functions of the President shall, before
entering upon his office, make and subscribe in the presence
of the Chief Justice of India or, in his absence, the senior
most Judge of the Supreme Court available, an oath or
affirmation in the following form, that is to say-swear in
the name of God.
"I, ____ do ___________________ that I solemnly affirm will
faithfully execute the office of President (or discharge the
functions of the President) of India and will do the best of
my ability preserve, protect and defend the Constitution and
the law and that I will devote myself to the service and
well-being of the people of India."
What are the Fundamental duties? Article 51A of Constitution of India, 1949