(1) Insurance for a purchasing group may be provided only by one or more of the following: An insurer holding a certificate of authority to transact the relevant line of business in Washington; a risk retention group registered in Washington; or an insurer acting lawfully in accordance with chapter
48.15 RCW and the regulations thereunder (except as provided in chapter
48.92 RCW or this regulation). Insurance for a domestic purchasing group may be provided only by an insurer holding a Washington certificate of authority to transact that type of insurance.