211 CMR, § 40.08
When a marketing method refers to either a dollar amount or a period of time for which any benefit is payable, or the cost of the policy, or specific policy benefit, or the loss for which such benefit is payable, it shall disclose the provisions relating to renewability, cancel ability and termination and any modification of reasons, in a manner which shall not minimize or render obscure the qualifying conditions or it shall be considered misleading, and therefore prohibited.
In this regard where there is a guarantee of renewability or premium which is conditional either on renewal of all such policies or premium adjustment on all such policies it will be considered misleading unless the marketing method clearly and conspicuously discloses that the insurer has the right to non-renew or to change premium levels at its choice and without specific approval of any state authority.
211 CMR, § 40.08