Section 295CC. Every licensed retail motor fuel dealer who offers for sale from both full-service and self-service motor fuel pumps or other dispensing devices from which motor fuel is sold at the same location, shall dispense motor fuel from the self-service pump or device for any owner-operator of a motor vehicle bearing handicapped person or disabled veteran number plates as described in section two of chapter ninety. Any such retail motor fuel dealer shall display in a prominent location one or more signs stating its compliance with the provisions of this section. The division of standards shall develop standards for such signs including, but not limited to, size, text, legibility and location.