SECTION 259.
Notwithstanding the provisions of chapter 32A of the General Laws to the contrary, item 1108-5500 in section 2 of this act may be expended for the provision of dental and vision benefits for those active employees of the commonwealth, not including employees of authorities and any other political subdivisions, who are not otherwise provided such benefits pursuant to a separate appropriation or the provisions of a contract or collective bargaining agreement. The commonwealth, on behalf of active employees, shall contribute no more than 75 per cent of the total monthly premium applicable to said benefits.