Any legally blind person who is licensed by the Department of Rehabilitation Services as a vending stand operator or managing operator shall be eligible for membership in the Health Insurance Plan, Dental Insurance Plan and Life Insurance Plan referred to in the Oklahoma Employees Insurance and Benefits Act. Enrollment in the Plan shall be optional with each operator pursuant to the rules prescribed by the Office of Management and Enterprise Services. Any payments required to be made for enrollees in the Plan shall be payable by the operator in such manner as may be determined by the Department of Rehabilitation Services; provided, that the Department may, in its discretion, make all or a part of such payments.