A reliable source in the PCB told PTI that Chairman Zaka Ashraf had given instructions to make them contractual employees.
"The idea is to have control over their activities and monitor them and their assignments. We plan to bring them under contractual obligations with the board," the source said.
Earlier, Ashraf had made it clear that the board had no role in the appointment of Asad Rauf in the IPL matches nor his going to India.
He admitted that the PCB was concerned because last month its integrity committee had banned test umpire Nadeem Ghouri for four years after he was found discussing spot-fixing details during a sting operation conducted by an Indian news channel.