The Muslim League of India had, since the middle of twentieth century, demanded for a separate homeland on the basis of the Two-nation theory.

The British rulers realized that the Hindus and Muslims of India remained two separate and distinct nations and socio-cultural entities.

On 3rd June 1947, Lord Mountbatten, the last Viceroy of India, called the conference of all the leaders of the Sub-continent and communicated to them his Government's Plan for the transfer of power.

The Government in return, went to the Federal Court, where the famous judgment was given by the then Chief Justice Muhammad Munir, according to which Maulvi Tamizuddin lost the case.

Legislative powers vested in the Parliament, which consisted of the president and the National Assembly with 300 Members divided equally between East and West Pakistan.

Although the first general election were scheduled for early 1959, President Iskandar Mirza abrogated the Constitution, dissolved the National and Provincial Assemblies, and declared Martial Law, on 7 October 1958.

Ayub dispatched the military unit to enter in presidential palace on the midnight of 26–27 October 1958 and placed him in an airplane to exile in England.

The objective of this commission was to submit proposals, as to how best democracy can be strengthened and molded according to the country's socio-political environment and Islamic principles of justice.

The 1973 Constitution provides for a parliamentary form of government where the executive authority of the state vests with the Prime Minister.

From 1947 to 1973, the country had had a unicameral system, but under the 1973 Constitution, Pakistan adopted a bicameral federal legislature, called Parliament, composed of the President, the Senate and the National Assembly.

This resulted in severe political crisis and Martial Law was imposed by the then Army Chief, General Muhammad Zia-ul-Haq, on 5 July 1977.

Order No.5, 4 July 2001), the National Security Council was established for the purpose to tender advice to the Chief Executive (later on President), on matters relating to Islamic ideology, national security, sovereignty, integrity and solidarity of Pakistan so as to achieve the aims and objective as enshrined in the Objectives Resolution 1949.

Syed Zafar Ali Shah, MNA and Illahi Bukhsh Soomro, Speaker National Assembly, challenged the suspension orders in the Supreme Court.

The Court in its judgment on 12 May 2000 validated the military takeover by giving three years time frame to the government, starting from 12 October 1999.

The court reserved the right of Judicial Review and power of validity of any act or any action of the government, if challenged, in the light of State necessity.

National Assembly of Pakistan expressed confidence in the leadership of President General Pervez Musharraf through the resolution on 1 January 2004.

After the resignation from the post of Chief of Army Staff, Mr. Pervez Musharraf administered the oath of President of Islamic Republic of Pakistan on 29 November 2007.

Mr. Pervez Musharraf submitted his resignation from his office to the Speaker National Assembly on 18 August 2008 and Mr. Asif Ali Zardari was elected 13th President of Pakistan for next five years on 6 September 2008.

President Asif Ali Zardari during his address to the Joint Session of the Parliament on 28 March 2009 asked the Speaker National Assembly to form a committee of both houses for the purpose of proposing amendments in the Constitution in the light of Charter of Democracy (COD).

After consultation with the leadership of all political parties in the Parliament, Speaker National Assembly announced the Constitutional Reforms Committee (CRC) on 29 April 2009.

After the marathon consultation in 77 meetings, CRC under the Chairmanship of Senator Raza Rabbani presented report of the committee on 18th Amendment in the Constitution to the Speaker National Assembly on 31 March 2010.

Through its debates, adjournment motion, question hour and Standing Committees, the National Assembly keeps as check over the Executive and ensures that the government functions within the parameters set out in the Constitution and does not violate the fundamental rights of citizens.

If the bill is passed in the joint sitting, with or without amendments, by the votes of majority of the members of the two houses, it shall be presented to the president for assent.

The Prime Minister, who heads the Cabinet and is meant to aid and advise the president in his functions, belongs to the National Assembly.

There is a democratic procedure, under article 95 of the constitution, to remove the Prime Minister from his office if he or she loses confidence of the majority of the members of the National Assembly.

If the resolution is passed by majority of the total membership of the National Assembly, the Prime Minister immediately ceases to hold the office.

Similarly, for the removal or impeachment of the president, not less than one-half of the total membership of either house may give in writing its intention to do so, to the Speaker National Assembly, or, as the case may be, to the Chairman Senate, for moving a resolution for the purpose.

The main purpose for the creation of the Aiwan-e Bala (English: Senate of Pakistan) was to give equal representation to all the federating units since the membership of the National Assembly was based on the population of each province.

The Senate, is a body which represents the provinces/territories of the country and promotes a feeling of equality, peace and harmony, which is essential for the growth and prosperity of a nation.

After the adoption of the Second Constitution of 1962, Parliament sessions were arranged both at Dhaka and a newly constructed building (Ayub Hall) at Rawalpindi.