Mass. Gen. Laws ch. 159C § 2
The office shall establish and maintain a no sales solicitation calls listing of consumers who do not wish to receive unsolicited telephonic sales calls. The office may contract with a private vendor to establish and maintain such listing, provided that: (i) the private vendor has maintained national no sales solicitation calls listings for more than 2 years; and (ii) the contract requires the vendor to provide the no sales solicitation calls listing in a printed hard copy format and in any other format offered at a cost that does not exceed the production cost of the format offered. The office shall provide notice to consumers of the establishment of a no sales solicitation calls listing. A consumer who wishes to be included on the listing shall notify the office by calling toll-free number provided by the office, or in such other manner and at such times as the office may prescribe, which may include electronic notification. A consumer on such listing shall be deleted from such listing upon the consumer's written request or in such other manner and at such times as the division may prescribe, which may include electronic notification. The office shall update such listing not less than quarterly and shall make such listing available to telephone solicitors and other persons for a fee as the office shall prescribe.
Mass. Gen. Laws ch. 159C, § 2