Sharif, 67, had to step down as the chief of the Pakistan Muslim League-Nawaz (PML-N) after he was disqualified as prime minister by the Supreme Court on July 28 in the Panama Papers scandal.
The Central Working Committee of the PML-N passed a resolution reposing its confidence in the leadership of Sharif, Pakistani media reported.
The leaders also agreed to amend the party's Constitution so that any person could assume the presidency even if that person did not hold public office, Dawn newspaper reported.
The recent passage of the Elections Bill 2017 a set of laws to reform Pakistan's election system by both the lower and upper houses of parliament has already paved the way for the former prime minister to once again take the helm of the PML-N.
More From This Section
Earlier in the day, an informal advisory session was held after Nawaz returned to Punjab House after appearing before an accountability court.
Nawaz had appeared before the Accountability Court today after being summoned in connection with three graft cases prepared by the National Accountability Bureau (NAB) against him and his family in the Panama Papers case.
Nawaz; his children Hussain, Hassan, and Maryam; and son-in- law Mohammad Safdar are now expected to appear on October 9 to be formally indicted.
The court has issued non-bailable arrest warrants for the men and a bailable warrant for Maryam, likely keeping in mind that she may need to stay with her ailing mother in London.
The PML-N has also convened a meeting of its general council today and tomorrow to formally begin the process of re-electing Sharif as the party's president.