Indonesia is a republic with a presidential system. As a unitary state, power is concentrated in the central government. Following the resignation of President Suharto in 1998, Indonesian political and governmental structures have undergone major reforms. Four amendments to the 1945 Constitution of Indonesia have revamped the executive, judicial, and legislative branches. The president of Indonesia is the head of state and head of government, commander-in-chief of the Indonesian National Armed Forces, and the director of domestic governance, policy-making, and foreign affairs. The president appoints a council of ministers, who are not required to be elected members of the legislature. The 2004 presidential election was the first in which the people directly elected the president and vice president. The president may serve a maximum of two consecutive five-year terms.