(1) Life insurance and annuity policy forms of the following types shall be defined and designated as participating forms of insurance only if they contain a provision for participation in the insurer's surplus, and shall be defined and designated as nonparticipating forms if they do not contain a provision for participation in the insurer's surplus:
(a) Forms which provide that the premium or consideration at the time of issue and subsequent premiums or considerations will be established by the insurer based on current, or then current, projected assumptions for such factors as interest, mortality, persistency, expense, or other factors, subject to a maximum guaranteed premium or premiums set forth in the policy; and
(b) Forms (except those for variable life insurance and variable annuity plans which are subject to chapter
48.18A RCW) which provide that their premiums or considerations are credited to an account to which interest is credited, and from which the cost of any life insurance or annuity benefits or other benefits or specified expenses are deducted.
(2) The commissioner may by regulation further clarify the definitions and requirements contained in subsection (1) of this section, and may classify any other types of forms as participating or nonparticipating, consistent therewith.