The two parties made the announcement after a JUI-F delegation led by Molana Rashid Mehmood Soomro held a meeting with the MQM-P Rabita Committee at their temporary headquarters in Karachi's Bahadurabad.
Bilawal Bhutto Zardari's remarks seemed to criticise the PPP allies for prioritising delimitation over holding elections within the constitutionally mandated 90-day period after the dissolution of assemblies.
In the statement, the electoral watchdog said the purpose of reducing the duration of the delimitation process is to ensure polls are held at an earliest.
Pakistan's election commission has said it will finish the delimitation process by December 14 to ensure that the next presidential election takes place on time, Geo News reported.
The Election Commission of Pakistan may announce schedule for the polls ahead of the competition of delimitation of constituencies of national and provincial assemblies.
In a meeting with representatives of the Election Commission of Pakistan (ECP), the Pakistan People's Party (PPP) on Tuesday reiterated its demand that the upcoming general elections take place within the 90-day window specified by the constitution, reported ARY News.
The Islamabad High Court (IHC) on Monday reserved a verdict on Pakistan Tehreek-e-Insaf (PTI) Chairman Imran Khan's plea seeking suspension of sentence by the trial court's Additional District and Sessions Judge (ADSJ) Humayun Dilawar in the Toshakhana case.
The Election Commission of Pakistan defended its move of delaying polls beyond a 90-day limit and said that the true representation of voters, contesting candidates will be impossible without fresh delimitation of constituencies and revised electoral rolls.