(1) The 2017 commissioners standard ordinary (CSO) mortality table may be used as allowed in RCW 48.74.030 (1)(a)(iii), 48.76.050 (4)(h)(vi), and WAC 284-74-340 (1) and (2), subject to the conditions in this regulation.

(2) An insurer may elect to use the 2017 CSO mortality table as the minimum standard for policies issued on or after January 1, 2017, until January 1, 2020. This table may be used for any one or more specified plans of insurance subject to the conditions in this regulation. If the insurer elects to use the 2017 CSO mortality table, it must do so for both valuation and nonforfeiture purposes.

(3) An insurer must use the 2017 CSO mortality table as the minimum standard for policies issued on or after January 1, 2020.