Under Massachusetts' mandatory life policy provisions, what is the minimum grace period an insurer must provide for payment of a premium after the due date?

Why this is the answer

M.G.L. c. 175 §132 requires every MA life insurance policy to include a 30-day grace period for premiums due after the first year. The policy remains in force during grace, and any unpaid premium may be deducted from proceeds if the insured dies in the window.