(a) For policies of life insurance delivered or issued for delivery in this State after May 24, 1982 a life insurer which has elected or which elects an operative date under section 4221(k)(2) of the New York Insurance Law may file with the department for use as part of the policy form, gender-blended mortality tables or a description thereof to determine minimum cash surrender values and minimum amounts and minimum periods of paid-up nonforfeiture benefits. These tables may be arrived at as follows:

1. (1) a mortality table which is a blend of the 1980 CSO table (M) and the 1980 CSO table (F), with or without 10-year select mortality factors;
2. (2) a mortality table which is obtained by applying the 1980 CET loading formula to the respective gender-blended 1980 CSO mortality table; and

3. (3) gender-blended tables with 10-year select mortality factors may be derived by applying select factors to gender-blended tables without select factors where the select factors are derived by using the following formula:

   ^ZF_t^T = (Z)F_t^M + .6(l − z) F_t^F/_{Z + .6(l − z)}

   where

   ^ZF_t^T is the gender-blended delect factor for year t

   F_t^M is the male select factor for year t

   F_t^F is the female select factor for year t

   Z is the ratio of male lives to the total lives at the pivotal age

(b) The following blendings will be considered as the basis for acceptable gender blended tables. However, other blendings shall also be acceptable:

1. (1) 100 percent Male 0 percent Female, for tables to be designated as the “1980 CSO-A” and “1980 CET-A” tables;
2. (2) 80 percent Male 20 percent Female, for tables to be designated as the “1980 CSO-B” and “1980 CET-B” tables;
3. (3) 60 percent Male 40 percent Female, for tables to be designated as the “1980 CSO-C” and “1980 CET-C” tables;
4. (4) 50 percent Male and 50 percent Female, for tables to be designated as the “1980 CSO- D” and “1980 CET-D” tables;
5. (5) 40 percent Male 60 percent Female, for tables to be designated as the “1980 CSO-E” and “1980 CET-E” tables;
6. (6) 20 percent Male 80 percent Female, for tables to be designated as the “1980 CSO-F” and “1980 CET-F” tables; and

7. (7) 0 percent Male 100 percent Female, for tables to be designated as the “1980 CSO-G” and the “1980 CET-G” tables.

   The actual tables as described in paragraphs (1) through (7) of this subdivision are contained in Appendix 20 of this Part. The tables set forth in Appendix 20 are not intended to be exclusive; other blendings of the tables referred to in paragraphs (a)(1) and (2) of this section are also acceptable.