Khan said his party would give deadline to prime minister to respond to allegations in the Panama Papers. He was speaking to media in Lahore.
He declined to share details of terms of references devised by his party for inquirry commission.
He reteirated that PM Sharif should run the government democratically. “Only dair elections can bring democracy in the country,” he remarked.
Prime Minister Nawaz Sharif on April 22 pledged to resign if a probe related to the Panama Papers tax scandal found his family had committed any wrongdoing.
Three of Sharif’s children were named in a vast leak of documents from Panama-based law firm Mossack Fonseca this month that has revealed how the wealthy hide their money.
The premier has announced a probe into the revelations contained in the Panama Papers, which claim his children owned London property through an offshore company.
He also pledged to create a new judicial commission headed by a retired judge to investigate the allegations, after his first proposal was rejected by lawmakers.