Shaharyar told reporters today in Lahore that while the PCB had started preparations for filing an appeal for banned pacer Aamir with the International Cricket Council (ICC), it had no such plans for Butt and Asif.
"The PCB is completing all legal formalities and will file an appeal with the ICC soon to get some relaxation for Aamir under the revised anti-corruption code of the ICC," said Shaharyar.
The trio was banned for spot fixing during the fourth Test against England at Lords in 2010 and later also served jail sentences in the United Kingdom for the same offence.
The three cricketers have been given minimum five-year bans by the anti-corruption tribunal of the ICC but while the ban for Butt and Aamir ends in August, 2015, the former also has been given a two-year suspended sentence.
Under the revised code, a banned player can apply to the ICC ACU to allow him to resume playing domestic cricket before his ban ends.