Last week, the PCB said in a statement that it reported the matter to the ICC in Sri Lanka and 'it took urgent steps'.
The ICC formed the ACSU in 2000 as match-fixing controversies rocked the cricketing world.
Many leading players, including Pakistan's Salim Malik and Ata-ur-Rehman, India's Mohammed Azaruddhin and South Africa's Hansie Cronje were banned for life after investigations by the ICC.
Back home, there have been demands from various quarters for a probe into the incidents with former PCB chief Tauqeer Zia and ex-Test spinner Abdul Qadir suggesting that the PCB should carry out its own investigations.