The KP government had request an extension owing to "difficulties faced in the maintenance of law and order".
PTI leader Naeemul Haque says Zartaj's move is "against the ethics of PTI, which has always opposed nepotism."
PPP chief says despite having evidence that letter was received, lawmakers told that it was not received.
At least 30 party workers and two MNAs were arrested after a scuffle with police.
Shahbaz had approved Maryam's appointment as one of 16 VPs for the party on May 3.
Ruling party's MNAs say her appointment is in conflict with the law and the Constitution.
Vohra had joined rival PSP after being elected the deputy mayor on MQM-P's ticket.
The bill had been presented by Finance Minister Asad Umar on Jan 23.
Lower house condemns India's "knee-jerk reaction" to Pulwama attack through resolution presented by NA speaker.
"This is the standard PTI wants to set," Punjab Governor Chaudhry Sarwar says.
PPP's Bilawal among lawmakers named in committees; Zardari and former PM Abbasi miss out.
Dr Amjad had quit the chairmanship of APML — founded by ex-military ruler retired general Pervez Musharraf — last year.
"I don't care if they remove my name [from the ECL] or not; it is not a favour to me," says PPP chairperson.
"We have found more evidence against Asif Zardari and have also got the evidence verified," claims Khurrum Sher Zaman.
The election commission will receive objections over the proposed delimitation from January 3 to February 1.
ECP says membership of MPAs, MNAs and Senators to be suspended if information not submitted by Jan 15.
AirSial to become operational within a year, says airline chairman.
The petition accuses the PPP co-chairman of concealing his assets in his nomination papers for the 2018 elections.
The results of the by-polls will be announced on Dec 24.
The documents shared by Ali Zaidi bear the name "Asif A. Zardari".