The Riigikogu is the unicameral parliament of Estonia. In addition to approving legislation, the Parliament appoints high officials, including the prime minister and chief justice of the Supreme Court, and elects the president. Among its other tasks, the Riigikogu also ratifies significant foreign treaties that impose military and proprietary obligations and bring about changes in law, as well as approves the budget presented by the government as law, and monitors the executive power.