211 CMR, § 121.06
In a Proceeding under M.G.L. c. 176K, § 7(d), the Rate Filing submitted to the Division in the form and manner prescribed by the Commissioner for all rate and form filings shall constitute the Filer's direct evidence, but the Filer shall submit to the Docket Clerk five additional copies of the Rate Filing, unless the Presiding Officer directs otherwise. The Presiding Officer may permit or order the Filer to supplement its Rate Filing with additional material in advance of the commencement of the Proceeding. The Filer shall submit to the Docket Clerk five copies of any supplemental information, unless the Presiding Officer directs otherwise.
The Filer shall serve two copies of its Rate Filing and any supplemental information on the State Rating Bureau, and one copy on each Statutory Intervenor and any Intervenor permitted to appear in the Filer's last rate Hearing for that insurance product, unless such person has advised the Filer that a copy is not wanted. The Filer shall serve a copy of its Rate Filing and any supplemental information on a person permitted to intervene within two business days after issuance of an order allowing the person to intervene. By agreement of the Parties concerned, copies may be served on a Party electronically.
211 CMR, § 121.06