Mass. Gen. Laws ch. 129 § 39C
Every person engaged in the hearing dog business shall obtain a license therefor from the director, the fee for which shall be determined annually by the commissioner of administration under the provision of section three B of chapter seven for the filing thereof, and such license shall expire on December thirty-first following the date of issuance, unless sooner revoked. The director may make rules and regulations governing the issuance and revocation of such licenses and the conduct of any business so licensed, and relative to the maintenance of premises, buildings and conveyances, the health of the dogs and the method and time of inspection of such dogs and business.
The director shall promptly furnish to the director of the office of deafness the name and address of each person licensed to conduct a hearing dog business, and the person so licensed shall promptly furnish to the director of the office of deafness with the name and address of each person to whom a hearing dog is furnished. A hearing dog shall, for identification purposes, be fitted with a collar and leash which are of a bright color.
Mass. Gen. Laws ch. 129, § 39C