Which event is governed by the twenty-day rule?

In Massachusetts, the twenty-day rule pertains specifically to the cancellation of an insurance policy. This rule requires that an insurer must provide at least twenty days' notice to the policyholder before a policy can be canceled. This notice period gives the insured adequate time to either remedy the situation prompting the cancellation or to seek alternative coverage.

This requirement is designed to protect consumers and ensure that they have sufficient notice and time to respond, thereby promoting fair practices in the insurance industry. While the other options involve aspects of insurance policies, such as issuance, premium adjustments, and renewals, they do not specifically fall under the stipulations of the twenty-day rule, which is explicitly focused on cancellation processes.