In applying the percentage specified in subdivision c, no nonforfeiture net level premium may exceed four percent of either the amount of insurance, if the insurance is uniform in amount, or the average amount of insurance at the beginning of each of the first ten policy years. The date of issue of a policy for the purpose of this section is the date as of which the rated age of the insured is determined.
N.D.C.C. § 26.1-33-24