The suspended Pakistani trio of Test captain Salman Butt and pace bowlers Mohammad Asif and Mohammad Aamir have until September 20 to ask for a hearing of the ICC's Anti-Corruption and Security unit to challenge the provisional suspension imposed on them.

Sources in the Pakistan Cricket Board said the three players, who allegedly conspired to bowl no balls to order in the Lord's Test against England last month, have to respond to the Notice of Charge issued to them by the ACSU general manager.