(a) This section shall not apply to ordinary policies issued on or after the operative date of Section 27-15-78, as defined therein.
(b) In the case of ordinary policies issued on or after the operative date of this section, all adjusted premiums and present values referred to in this article shall be calculated on the basis of the Commissioners 1958 Standard Ordinary Mortality Table, provided that, for any category of ordinary insurance issued on female risks, adjusted premiums and present values may be calculated according to an age not more than three years younger than the actual age of the insured and provided that, for any category of ordinary insurance issued on female risks on or after July 30, 1979, adjusted premiums and present values may be calculated according to an age not more than six years younger than the actual age of the insured.
(c) 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 in the case of ordinary policies may not be more than those shown in the Commissioners 1958 Extended Term Insurance Table.
(d) 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.