The Constitution of Pakistan, also known as the 1973 Constitution, is the supreme law of Pakistan. The document guides Pakistan's law, political culture, and system. It sets out the state's outline, the fundamental rights of the population, the state's law and orders, and also the structure and establishment of the institutions and the armed forces. Drafted by the government of Zulfikar Ali Bhutto, with additional assistance from the country's opposition parties, it was unanimously approved by the 5th Parliament on 10 April and ratified on 14 August 1973. The first three chapters establish the rules, mandate, and separate powers of the three branches of the government: a bicameral legislature; an executive branch governed by the Prime Minister as chief executive; and an apex federal judiciary headed by Supreme Court. The Constitution designates the President of Pakistan as a ceremonial Head of State who is to represent the unity of the state. The first six articles of the constitution outline the political system as federal parliamentary republic system; as well as Islam as its state religion. The Constitution also encapsulates provisions stipulating the legal system's compliance with Islamic injunctions contained in the Quran and Sunnah.

Zulfikar Ali Bhutto was a Pakistani barrister, politician, and statesman. He served as the fourth president of Pakistan from 1971 to 1973 and later as the ninth prime minister of Pakistan from 1973 to 1977. Bhutto founded the Pakistan People's Party (PPP) and served as its chairman until his execution.