The Pakistan Cricket Board (PCB) is not providing any financial assistance to the three suspended players in their legal battle against the International Cricket Council (ICC).
"The three have hired lawyers who are representing the players in their effort to get the suspensions removed and their names cleared in the spot-fixing allegations," a PCB source said.
Mohammad Asif will be represented by a British lawyer, Elizabeth Robertson, while Salman Butt's lawyers are Khalid Ranjha and Aftab Gul.
"Muhammad Aamir's case is being fought by Shahid Karim who also represented Asif in his doping suspension case two years ago," the source said.
Butt had earlier approached Pakistan's top lawyer and a former Federal Minister, Aitzaz Ahsan to represent him but they couldn't settle on a fee.
"Since the players have been told they have to pay the lawyers themselves, Butt couldn't afford Ahsan's fee," the source said.
Karim said that his client (Aamir) is yet file a detailed reply to the ICC notice sent to him explaining the suspension.
"We had asked for an extension from the ICC to file the detailed reply and they have given us time until October 5. We are in the process of filing an appeal against the provisional suspension and also against the allegations made against Aamir," Karim said.
The lawyer said that the ICC had, in its notice, said that Aamir had bowled two no-balls on purpose in the fourth Test against England at Lord's, which amounted to fixing and betting under ICC's Anti-Corruption Code of Conduct.
"We will file two appeals to the ICC, one against the suspension and one against the allegations," Karim said.
Butt has already filed an appeal against his suspension while a board official said that Asif's reply would be filed directly in London to the ICC.