Wicketkeeper Kamran Akmal and former captain Shahid Afridi have not been given new central contracts by the PCB.
Pakistan will try a new opening pair in their final World Cup Group A match against Australia.
Pakistan coach Waqar Younis is reluctant to drop Kamran Akmal despite his horror show against New Zealand.
Shahid Afridi claimed 5-16 as Pakistan opened their World Cup campaign with a 205-run win over Kenya.
Kamran Akmal has been included in Pakistan's preliminary 30-man World Cup squad, but Shoaib Malik and Danish Kaneria miss out.
Kamran Akmal says he has given full co-operation to the PCB's integrity committee as he tries to gain clearance to play again.
Kamran Akmal and Shoaib Malik have expressed their disappointment after being omitted from the Pakistan squad to tour New Zealand.
Pakistan have said they will not suspend any of their players while investigations into 'spot-fixing' allegations continue.
Ricky Ponting says he fears individual performances in Australia's win over Pakistan in Sydney earlier this year will be "tainted".
Pakistan's Kamran Akmal said advice from former England wicketkeeper Alec Stewart has helped get his game back on track.
Pakistan wicketkeeper Kamran Akmal and brother Umar have filed appeals against the fines they were handed by the PCB last month.
Pakistan's dismal tour of Australia has been enveloped by a fresh crisis over who takes over from banned T20 skipper Shahid Afridi.
Pakistan have handed a debut to wicketkeeper Sarfraz Ahmed for the third and final Test match against Australia in Hobart.
Pakistan wicketkeeper Sarfraz Ahmed is likely to replace Kamran Akmal for the third Test against Australia.
Younus Khan was finally dismissed for 313 as the first Test between Pakistan and Sri Lanka finished in a stalemate.
Pakistani selectors have dropped experienced wicket-keeper Kamran Akmal for the Asia Cup tournament.
Pakistan clinched the series with a 23-win over Bangladesh in the third one-day international.
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