The Iranian Constitution stipulates that in the event of the president's death, the first vice president is to assume the powers and functions of the president, subject to approval by the Supreme Leader.
If the current president were to pass away, First Vice President Mohammad Mokhber would step into the role, pending the approval of Iran's Supreme Leader Ayatollah Ali Khamenei. Reports indicate that Mokhber was en route to the location where the president's helicopter had crashed.
Furthermore, the constitution requires the heads of the three branches of government - the vice president, speaker of the parliament, and head of the judiciary - to organize an election to select a new leader within 50 days of the vice president assuming the position of acting president.
It is important to note that Iran's supreme leader holds significant authority over both domestic and foreign affairs within the Islamic Republic, overshadowing the powers of the country's president.
In contrast to his predecessor, the moderate former President Hassan Rouhani, the current President Ebrahim Raisi has cultivated a strong alliance with Khamenei. Many Iranians speculate that Raisi is being prepared for potential ascension to the supreme leadership role in the future.