ESPNcricinfo understands the PCB is likely to reject NOCs to several all-format players for upcoming franchise tournaments. While the Global T20 League in Canada has not yet been officially sanctioned by the ICC - without which the PCB cannot issue NOCs to centrally contracted players - it is believed Shaheen Shah Afridi, Mohammad Rizwan and Babar Azam will not be allowed to play there either way, with workload management likely cited as the reason.

The immediate implications of the decision mean The Hundred's Birmingham Phoenix will lose out on Naseem next month, while Afridi, Rizwan and Babar will be unavailable for the Global T20 League Canada. Neither tournament directly clashes with any international cricket Pakistan play, but with a busy upcoming schedule for the national side, it is understood the PCB wishes to see their all-format players rest up ahead of Pakistan's two-match Test series against Bangladesh, which starts on August 21.

Though the GLT20 awaits official ICC sanction, the Pakistan players drafted were fully expected to be allowed to play the league; Afridi is scheduled to travel to Canada shortly, with the tournament officially slated to begin on July 25. Naseem, meanwhile was set to earn 125,000 for his time at The Hundred, which starts on July 23.

This doesn't necessarily mean no NOC requests will be entertained, with the latest NOC repressions likely to only affect those considered all-format regulars. Usama Mir, who had his NOC denied last month for the T20 Blast, will be allowed to play The Hundred, as will Haris Rauf.

The NOC rejections are set to go further than just the leagues over the next month. Pakistan have a virtually non-stop cricketing schedule from October to May the following year. They play three Tests against England at home that month, followed by limited-overs series in Australia, Zimbabwe and South Africa, a Test series in South Africa, a home Test series against the West Indies, a home tri-series featuring South Africa and New Zealand, a home Champions Trophy, and the PSL. It is understood the PCB will entertain no NOC requests during that period for all-format players, which coincides with a spate of T20 leagues.

The three-year central contracts the PCB and the players signed last year allowed for two overseas franchise leagues per year, as long as those tournaments did not clash with the player's international commitments. While the contracts do state the PCB has the right to refuse NOCs if they feel it is in the best interests of Pakistan's international obligations, the decision to withdraw the players from leagues which do not directly clash with international cricket is set to cause discontent among players affected, and questions around whether the allowance made in central contracts is being respected in spirit.