Prime Minister Shahid Khaqan talked to media on Wednesday and said the cabinet ministers will take oath within one or two days, adding that the ruling party has now conducting consultation on the names of cabinet members.
A new federal cabinet was due to be sworn in later yesterday, with media reporting that Abbasi would make the decision in consultation with Sharif and retain most of the former prime minister's loyalists.
The postponement of the ceremony came hours after the newly elected prime minister met Nawaz Sharif in Murree, where the former premier is staying with his family after the Supreme Court last week disqualified him over failure to disclose receivables as an asset.
Shahid Khaqan Abbasi, a longtime Sharif loyalist nominated for the top slot, is nearly certain to win the vote since the nation's ruling party, the Pakistan Muslim League, commands a comfortable majority in the house.
Sources said the formation of the federal cabinet and portfolios of the ministers are also being discussed in the meeting that was also joined by PML-N leaders Ishaq Dar, Chaudhry Nisar and Shahbaz Sharif.
The investments involve building infrastructure in Pakistan as part of China's Belt and Road initiative. He said that we want to impart this message to the world that individuals can change but the policies remain the same.
The PML-N party on Tuesday used its majority in the National Assembly to install Abbasi who is expected to serve until Shahbaz can take over.
Abbasi preferred to meet Sharif as his first task after taking oath as the chief executive of Pakistan.