The National Assembly () is a unicameral legislative body, and is governed on the basis of democratic centralism. It is the highest representative organ and the highest state organ. The National Assembly is the only organ vested with constitutional and legislative powers. It is responsible for fundamental domestic and foreign policies, socio-economic policies, defence and security issues, and it exercises supreme control over all state activities. Delegates (or members) of the National Assembly are elected through secret ballots in democratic elections which are held every fifth year. The National Assembly is convened twice a year, and its Standing Committee represents it between sessions.