<P> Article 57 provides that a person who holds, or who has held, office as President shall, subject to the other provisions of this constitution, be eligible for re-election to that office . </P> <P> Under The Presidential and Vice-Presidential Elections Act, 1952, a candidate to be nominated for the office of president needs 50 electors as proposers and 50 electors as seconders for his name to appear on the ballot . </P> <P> Article 56 (1) of the constitution provides that the president shall hold office for a term of five years from the date on which he enters upon his office . According to Article 62, an election to fill a vacancy caused by the expiration of the term of office of President shall be completed before the expiration of the term . An election to fill a vacancy in the office of President occurring by reason of his death, resignation or removal, or otherwise shall be held as soon as possible after, and in no case later than six months from, the date of occurrence of the vacancy; and the person elected to fill the vacancy shall, subject to the provisions of Article 56, be entitled to hold office for the full term of five years from the date on which he enters upon his office . To meet the contingency of an election to the office of President not being completed in time due to unforeseen circumstances like countermanding of election due to death of a candidate or on account of postponement of the poll for any valid reason, Article 56 (1) (c) provides that the president shall, notwithstanding the expiration of his term, continue to hold office until his successor enters upon his office . </P> <P> Certain conditions, per Article 59 of the Indian constitution, debar an otherwise eligible citizen from contesting the presidential elections . The conditions are: </P>

How many years make up one term of the president of india