In a bid to identify bowlers with suspect actions at an early stage, Pakistan has set up a bowling action review committee under former Test player Mudassar Nazar.
"The committee has decided to initially try to improve the bowling actions of bowlers reported last season," PCB Director Abbas Zaidi said on Tuesday.
"The identification of such a high number of bowlers is a worry. We have divided them into four groups for remedial work."
Pakistan's Shoaib Akhtar, Shabbir Ahmed, Shoaib Malik, Shahid Afridi, Mohammad Hafeez and Riaz Afridi have been reported for suspect actions at international level.
Shabbir is under a 12-month ban from the ICC while fellow paceman Shoaib has been reported three times in his career.
The committee has three ex-Test bowlers, Iqbal Qasim, Aaqib Javed and Mohammad Nazir, who will record footage of the 55 bowlers and do a biomechanial analysis.
Zaidi said that in the next domestic season, every first class and under-19 match would be videotaped so the board could spot suspect actions and help improve umpiring standards.
He also announced captain Inzamam-ul-Haq, Mohammad Yousuf, Abdul Razzaq, Shoaib Akhtar, Younis Khan and Shahid Afridi had been given category A central contracts with a monthly retainer of 250,000 rupees ($8,800).
Fourteen other players have been given contracts in two other categories worth Rs 156,000 and 93,000.
