211 CMR, § 40.14
In order to assure compliance under 211 CMR 40.00, each carrier shall maintain at its home or principal office a complete file containing every printed, published or prepared marketing method of its individual policies and typical printed, published or prepared marketing methods of its blanket, franchise and group policies hereafter disseminated in this or any other state whether or not licensed in such other state, with a notation attached to each such marketing method that shall indicate the manner and extent of distribution and the form number of any policy advertised or marketed. Such file shall be subject to regular and periodic inspection by the Division of Insurance. All such marketing methods shall be maintained in said file for a period of either four years or until the filing of the next regular report on examination of the carrier, whichever is the longer period of time.
211 CMR, § 40.14