1.    This section does not apply to policies issued on or after the operative date of section 26.1-33-24. Except as provided in subsection 3, the adjusted premiums for any policy must be calculated on an annual basis and must be such uniform percentage of the respective premiums specified in the policy for each policy year, excluding amounts stated in the policy as extra premiums to cover impairments or special hazards, that     the present value, at the date of issue of the policy, of all the adjusted premiums equals the sum of:

a.    The then present value of the future guaranteed benefits provided for by the policy.

b.    Two percent of the amount of insurance, if the insurance is uniform in amount, or of the equivalent uniform amount, as hereinafter defined, if the amount of insurance varies with duration of the policy.

c.    Forty percent of the adjusted premium for the first policy year.

d.    Twenty-five percent of either the adjusted premium for the first policy year or the adjusted premium for a whole life policy of the same uniform or equivalent uniform amount with uniform premiums for the whole of life issued at the same age for the same amount of insurance, whichever is less.

In applying the percentages specified in subdivisions c and d, no adjusted premium may be deemed to exceed four percent of the amount of insurance or level amount equivalent. 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.

2.    In the case of a policy providing an amount of insurance varying with duration of the policy, the equivalent level amount for the purpose of this section is deemed to be the level amount of insurance provided by an otherwise similar policy, containing the same endowment benefit or benefits, if any, issued at the same age and for the same term, the amount of which does not vary with duration and the benefits under which have the same present value at the inception of the insurance as the benefits under the policy.

3.    The adjusted premiums for any life insurance policy providing term insurance benefits by rider or supplemental policy provision must be equal to:

a.    The adjusted premiums for an otherwise similar policy issued at the same age without such term insurance benefits, increased, during the period for which premiums for the term insurance benefits are payable, by; b.    The adjusted premiums for such term insurance, subdivisions a and b being calculated separately and as specified in subsections 1 and 2 except that, for the purposes of subdivisions b, c, and d of subsection 1, the amount of insurance or equivalent uniform amount of insurance used in the calculation of the adjusted premiums referred to in subdivision b of subsection 1 must be equal to the excess of the corresponding amount determined for the entire policy over the amount used in the calculation of the adjusted premiums in subdivision a.

4.    Except as otherwise provided in sections 26.1-33-22 and 26.1-33-23, all adjusted premiums and present values referred to in sections 26.1-33-18 through 26.1-33-28, for all policies of ordinary insurance, must be calculated on the basis of the commissioners 1941 standard ordinary mortality table. However, for any category of ordinary insurance issued on female risks, adjusted premiums and present values may be calculated according to any age not more than three years younger than the actual age of the insured and such calculations for all policies of industrial insurance must be made on the basis of the 1941 standard industrial mortality table. All calculations must be made on the basis of the rate of interest, not exceeding three and one-half percent per annum, specified in the policy for calculating cash surrender values and paid-up nonforfeiture benefits. In calculating the present value of any paid-up term insurance with accompanying pure endowment, if any, offered as a nonforfeiture benefit, the rates of mortality assumed may be not more than one hundred thirty percent of the rates of mortality according to the applicable table. For insurance issued on a substandard basis, the calculation of any adjusted premiums and present values may be based on such other table of mortality as may be specified by the insurer and approved by the commissioner.