Letter says FIFA "strongly condemns, finds such actions to be totally unacceptable", days after takeover of PFF headquarters.
The tournament was delayed earlier this month after seven people participating in PSL 6 tested positive for Covid-19.
PCB will concentrate on "safe and secure passage" for participants, arrange repeat PCR tests, vaccines, and isolation facilities.
PCB rejects Indian media reports that Pakistani authorities denied Prasanna Agoram a visa.
"Gibbsy has always been a great student of the modern game [...] I reckon he is a great fit at our team," says Wasim Akram.
An ex-navy serviceman, Zaman was honoured for his achievements in cricket and association with the navy.
"This is a personal decision [...] the PCB will not comment further on this matter at this stage," the cricket board says.
England will play two T20 matches against Pakistan before both teams leave for India for the T20 World Cup.
Pakistan face Zimbabwe in three One-day Internationals and T20 Internationals each in Rawalpindi and Lahore.
The rescheduled event will take place in Sri Lanka next year while Pakistan will play host in 2022.
Mushtaq Ahmed has been appointed the team's spin bowling coach and mentor for the tour, according to a press release by the PCB.
"The PCB fully respects and endorses Cricket Ireland's decision," says board's chief executive Wasim Khan.
The two athletes will be honoured for their services though the Hamaray Heroes platform, says the PCB.
Sammy says he realises he is not fit enough to play, match with Quetta Gladiators will be his last.
Former Sri Lanka captain says the MCC team were "really impressed and very moved" by their welcome in Pakistan.
Ehsan Mani reveals the PCB plans to "aggressively" bid to host ICC events between 2023 and 2031.
The runner-up team will receive $200,000; $4,500 announced for each player of the match, $80,000 for other categories.
Production will also include DRS, hawkeye ball-tracking as well as ultra-motion and stump cameras.
For the first time, all 34 matches will be played across four Pakistan venues.
Of the total 34 matches, 14 will take place in Lahore, nine in Karachi, eight in Rawalpindi and three in Multan.