N.J. Stat. § 17B:25-3
There shall be a provision that a grace period of 30 days, or, at the option of the insurer, of 1 month of not less than 30 days, or of 4 weeks in the case of industrial life insurance policies the premiums for which are payable more frequently than monthly, shall be allowed within which the payment of any premium after the first may be made, subject, at the option of the insurer, to an interest charge not in excess of 6% per annum for the number of days of grace elapsing before the payment of the premium, during which period of grace the policy shall continue in full force; but if a claim arises under the policy during such period of grace, the amount of any premium due or overdue, together with such interest, if any, and any deferred premiums of the current policy year may be deducted from any amount payable under the policy in settlement.
N.J.S. § 17B:25-3