The diamond became part of the crown of incumbent Queen Elizabeth-II at the time of her crowing, the petition said.
A court in Lahore today gave two weeks' time to a petitioner to inform it under which law Pakistan could seek return of the famed Kohinoor diamond from Britain that India has been trying to get from the UK for years. Petitioner Barrister Javed Iqbal Jaffrey told the Lahore High Court that Kohinoor diamond was "Pakistan asset" as it is in "illegal possession" of Britain.
"The British government had refused to hand over the diamond to India. Now Pakistan should lay claim on it as it is first entitled to have it. It is the Pakistani government's duty to bring it back," he said.
During the hearing of the case, Lahore High Court Justice Khalid Mahmood Khan asked the petitioner to give reference of the law under which the Pakistani government could seek the return of the diamond from the British government.
The court is hearing the maintainability of the case. It directed the federal and Punjab law officers to appear on next hearing on February 25 and give arguments about its maintainability.
Last December, the Lahore High Court Registrar's office had objected to the maintainability of the petition, saying the court had no jurisdiction to hear this case against the British Queen. However, on February 8, the Court overruled the objection and admitted the petition for hearing.
The British Queen, the British High Commission in Pakistan and the Pakistani government have been made respondents in the case.
Mr Jaffery said the British had snatched the diamond from Daleep Singh, grandson of Maharaja Ranjeet Singh and took to the UK.
"The diamond became part of the crown of incumbent Queen Elizabeth-II at the time of her crowing in 1953. Queen Elizabeth has no right on the Kohinoor diamond, which weighs 105 carats and worth billions of rupees," he said, adding Kohinoor diamond was cultural heritage of Punjab province and its citizens owned it.