The government of Vatican City has a unique structure. The pope is the sovereign of the state. Legislative authority is vested in the Pontifical Commission for Vatican City State, a body of cardinals appointed by the pope for five-year periods. Executive power is in the hands of the president of that commission, assisted by the general secretary and deputy general secretary. The state's foreign relations are entrusted to the Holy See's Secretariat of State and diplomatic service. Nevertheless, the pope has absolute power in the executive, legislative, and judicial branches over Vatican City.