Maryland Insurance Section 16-202
§ 16-202.
  (a)   (1)   Each policy of life insurance shall contain a provision that a grace period shall be allowed within which the payment of any premium after the first may be made.
    (2)   The grace period shall be:
      (i)   30 days;
      (ii)   at the option of the insurer, 1 month of not less than 30 days; or
      (iii)   4 weeks, for a policy of industrial life insurance with premiums payable more frequently than monthly.
  (b)   The policy continues in full force during the grace period.
  (c)   If a claim arises under the policy during the grace period, the amount of any premium due or overdue may be deducted from the policy proceeds.