N.D. Cent. Code § 26.1-33-12
If any individual insured under a group life insurance policy delivered in this state after July 1, 1983, becomes entitled under the terms of the policy to have an individual life insurance policy issued without evidence of insurability, subject to making of application and payment of the first premium within the period specified in the policy, and if the individual is not given notice of the existence of the right at least fifteen days prior to the expiration date of the period, then the individual has an additional period within which to exercise that right. This additional period expires fifteen days after the individual is given notice. Written notice presented to the individual or mailed by the policyholder to the last-known address of the individual or mailed by the insurer to the last-known address of the individual as furnished by the policyholder or notice of the right of conversion included in a certificate provided to each employee or notice provided by the attachment of a separate notice to the certificate constitutes notice for the purpose of this section.
N.D.C.C. § 26.1-33-12