RCW 18.53.165 through 18.53.185 shall apply to all agreements, renewals, or contracts issued on or after June 7, 1973.

Health care service contracts having a participant agreement with a majority of the licensed optometrists within its service area may provide benefits to persons or groups of persons through contracts which allow a subscriber to utilize on an equal participation basis the services of any participant provided in the contract, and such contracts shall not be discriminatory.