10- 144 C.M.R. ch. 260, § 2
Except as hereinafter provided, the only valid certificate of immunization shall be the certificate of immunization specified by the National Association of State Public Health Veterinarians in effect at the time the dog is subject to licensure or renewal of license, and authenticated by a licensed veterinarian. Certificates generated by computer systems, and containing the same information, in the same locations, shall be considered acceptable alternative certificates. The certificate must be fully completed, and must show the date of vaccine administration, and the date a booster vaccination is due (expiration date), in accordance with the manufacturer's label for the vaccine used. Only vaccines licensed by the US Food and Drug Administration shall be used.
10- 144 C.M.R. ch. 260, § 2