Iran's Ministry of Interior Affairs on Tuesday officially started registering candidates for the 13th presidential race.

From Sunday, each candidate will be scrutinized by the Guardian Council of the Constitution (GCC), the country's highest legislative body. The GCC will assess the qualification of the applicants and release the names of qualified candidates by May 27.

The nominees will have 20 days to campaign before election day.

A presidential candidate should be an Iranian national, prudent and capable of taking on leadership duties, and believe in the Islamic republic's principles and official religion, according to the constitution.