Maryam's lawyer says ECP holds jurisdiction over national elections, not party elections.
Election commission says the arrests, which were made under Section 3 of MPO, are "tantamount to pre-poll rigging".
The secretary has been ordered to appear in person at 11am on June 28.
Ruckus erupts in assembly after Shehbaz Sharif calls Prime Minister Imran Khan a "selected prime minister".
Reply submitted by Babar Awan says the premier visited Ghotki only to condole the death of his cabinet member.
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.