Independence:
15 September 1821 (from Spain)
National holiday:
Independence Day, 15 September (1821)
Constitution:
11 January 1982, effective 20 January 1982; amended many times
Legal system:
rooted in Roman and Spanish civil law with increasing influence of English common law; recent judicial reforms include abandoning Napoleonic legal codes in favor of the oral adversarial system; accepts ICJ jurisdiction with reservations
Suffrage:
18 years of age; universal and compulsory