The Thirteenth Amendment to the Constitution of Pakistan was a short-lived amendment to the Constitution of Pakistan, adopted by the Parliament of Pakistan in 1997 by the civilian government of Prime Minister Nawaz Sharif. It stripped the President of Pakistan of his reserve power to dissolve the National Assembly, and thereby triggering new elections and dismissing the Prime Minister. The Constitutional Amendment was supported by both the government and the opposition, and was thus passed unanimously. With the enforcing of this amendment, Pakistan's system of government was shifted from Semi-presidential system to Parliamentary democratic republic system.