This Edition, which is intended to provide an updated version of the Constitution, incorporates all amendments made in it till date. The fourteenth Amendment in the Constitution empowered a check on floor crossing of legislators.In the wake of the war, the Congress submitted, and the States ratified, the Thirteenth. The Constitution of the Islamic Republic of Pakistan (as amended up to February 28, 2012), Pakistan ; Details ; Year of Version 2012 ; Dates. The Eighteenth Amendment to the Constitution of the Islamic Republic of. Pakistan, a landmark event in the constitutional history of Pakistan, was passed. Roots in the Constitution,'' at least ''in some circumstances,'' the Court seemed to in- dicate. The Fourteenth Amendment Due Process Clause. More in The Constitution. The 18th Amendment altered about a third of Pakistan's Constitution.