Whenever any employees of the board of Governors of West Virginia University shall be eligible to participate in any group insurance plan, the board shall have the authority to authorize such participation, and upon the written request of any participating employee, may make periodic deductions from salary payments due such employee of the amount of the contribution he is required to make for such participation. Upon proper requisition of the board, the Auditor shall periodically issue a warrant, payable as specified in the requisition, for the total contributions so withheld from the salaries of all participating employees.