It also aims to reduce the powers of the Supreme Court, with some authorities shifted to the proposed Constitutional Court, and immunity to the president from criminal proceedings for life.
Pakistan's Supreme Court has issued a notice to Prime Minister Raja Pervez Ashraf in a case regarding the newly introduced contempt of court law.
At least 75 people were killed and 115 others injured in the attack.
Continuing their tough stance against activists and lawyers, Pakistani authorities on Friday blocked all major highways leading to Islamabad to prevent a protest march demanding reinstatement of sacked judges, from reaching the capital. Police and paramilitary forces today blocked another group of activists marching from Balochistan's capital Quetta to Sukkur in Sindh and arrested the Supreme Court Bar Association President Ali Ahmed Kurd along with some others.
The bomb was planted along the side of the road and exploded as the Anti-Terrorism Force vehicle passed by.
The blast was claimed by both the local affiliate of the Islamic State terror group and by Jamaat-ul-Ahrar, a splinter group of the Tehrik-e-Taliban Pakistan.