The petition argued that former Prime Minister Shaukat Aziz had recommended taking extra-constitutional measures to proclaim an emergency in 2007.
Musharraf's lawyers had repeatedly sought time from the special court trying him for treason on the ground that the apex court was yet to decide his review petition.
The former army chief was admitted to a hospital in Rawalpindi in January 2 after he developed heart problems while being driven to the special court.
During today's hearing in the Supreme Court, Musharraf's counsel Sharifuddin Pirzada said unconstitutional steps had been taken several times in Pakistan's past and the judiciary had endorsed these steps on important issues.
To substantiate his claims, Pirzada also gave the example of emergency being imposed in Canada and India.
On hearing this, Justice Jawad Khawaja asked if constitutional provisions on treason were applicable in Canada, and Pirzada replied they were applicable in Canada and a few other countries.
Musharraf is the first military ruler to be put on trial for treason in Pakistan's history.
If convicted, he could face life imprisonment or the death penalty.
