Supporters hold portraits of Iranian President-elect Masoud Pezeshkian in Tehran, July 6. (Source: AFP)

After the inauguration ceremony, Mr. Masoud Pezeshkian will become the 9th president of Iran.

“The president’s inauguration will be held on August 4 or 5. The president will have 15 days to submit a list of his proposed ministers to parliament before the body holds a vote of confidence,” said Mojtaba Yosefi, a member of the Iranian parliament’s executive committee.

According to the rules, the president-elect of Iran must swear an oath before the parliament before officially taking office. The oath-taking ceremony takes place after the president-elect receives official endorsement from the supreme leader of the Islamic republic.

In Iran, the president is not the head of state and power rests with the Supreme Leader - a position held by Ayatollah Ali Khamenei for the past 35 years.

Mr Pezeshkian won a run-off election on 5 July against conservative candidate Saeed Jalili, to replace the late President Ebrahim Raisi, who died in a helicopter crash in May.

The 69-year-old reformer won with more than 16 million votes, about 54%, while his opponent Mr. Jalili won more than 13 million, about 44%, out of a total of about 30 million votes cast.

Iranian newspapers have carried front-page pictures of Mr Pezeshkian and called for unity under the president-elect.