Costa Rica is a democratic republic with a strong system of constitutional checks and balances. Executive responsibilities are vested in a president, who is the country's center of power. There also are two vice presidents and a 15-member cabinet. The president and 57 Legislative Assembly deputies are elected for 4-year terms. In April 2003, the Costa Rican Constitutional Court annulled a constitutional reform enacted by the Legislative Assembly in 1969 barring presidents from running for reelection. The law reverted back to the 1949 Constitution, which states that ex-presidents may run for re-election after they have been out of office for two presidential terms, or eight years. Deputies may run for reelection after sitting out one term, or four years.
The electoral process is supervised by an independent Supreme Electoral Tribunal--a commission of three principal magistrates and six alternates selected by the Supreme Court of Justice. Judicial power is exercised by the Supreme Court of Justice, composed of 22 magistrates selected for renewable 8-year terms by the Legislative Assembly, and subsidiary courts. A Constitutional Chamber of the Supreme Court, established in 1989, reviews the constitutionality of legislation and executive decrees and all habeas corpus warrants.