Pakistan adopted bicameral legislature under Constitution of

Pakistan adopted a bicameral legislature under the Constitution of 1973. This constitution established a parliamentary system with two houses: the National Assembly (the lower house) and the Senate (the upper house). This structure ensures representation for both the population (via the National Assembly) and the federating units or provinces (via the Senate), reflecting Pakistan's federal character.

• The 1956 Constitution provided for a unicameral legislature.
• The 1962 Constitution (under Ayub Khan) also featured a unicameral system.
• 1965 was a year under the 1962 constitution, and 1999 saw a military coup, neither of which established the bicameral system.