Iran
After the Supreme Leader, the Constitution defines the President of Iran as the highest state authority. The President is elected by universal suffrage for a term of four years, however, the president is still required to gain the Leader's official approval before being sworn in before the Parliament (Majlis). The Leader also has the power to dismiss the elected president anytime. The President can only be re-elected for one term.
The President is responsible for the implementation of the constitution, and for the exercise of executive powers in implementing the decrees and general policies as outlined by the Supreme Leader, except for matters directly related to the Supreme Leader, who has the final say in all matters. Unlike the executive in other countries, the President of Iran does not have full control over anything, as these are ultimately under the control of the Supreme Leader. Chapter IX of the Constitution of the Islamic Republic of Iran sets forth the qualifications for presidential candidates. The procedures for presidential election and all other elections in Iran are outlined by the Supreme Leader. The President functions as the executive of affairs such as signing treaties and other international agreements, and administering national planning, budget, and state employment affairs, all as approved by the Supreme Leader.
Government of the Islamic Republic of Iran
In the Islamic Republic of Iran, President is the second person of government and the head of government. The President is the highest popularly elected official in Iran, although the President answers to the Supreme Leader of Iran, who functions as the country's head of state. Chapter 9 (Articles 133-142) of the Constitution of the Islamic Republic of Iran sets forth the qualifications for presidential candidates and procedures for election, as well as the President's powers and responsibilities as "functions of the executive". These include signing treaties and other agreements with foreign countries and international organizations; administering national planning, budget, and state employment affairs; and appointing ministers subject to the approval of Parliament.