Mass. Gen. Laws ch. 176O, § 6
(a) A carrier shall issue and deliver to at least one adult insured in each household residing in the commonwealth, upon enrollment, an evidence of coverage and any amendments thereto. Said evidence of coverage shall contain a clear, concise and complete statement of:
(4) the locations where, and the manner in which, health care services and other benefits may be obtained, including:
(7) the requirement that an insured's coverage may be canceled, or its renewal refused, only in the following circumstances:
(b) A dental or vision carrier shall issue and deliver to at least 1 adult insured in each household residing in the commonwealth, upon enrollment, an evidence of coverage and any amendments thereto, a summary of the information contained in the evidence of coverage or refer the insured to resources where the information can be accessed, including, but not limited to, an internet website. If the dental or vision carrier chooses to deliver an evidence of coverage, it shall contain a clear, concise and complete statement of:—