(1) No person shall either within or outside of this state enter into any contract, understanding or combination with any other person to do jointly or severally any act or engage in any practice for the purpose of

(a) controlling the rates to be charged for insuring any risk or any class of risks in this state; or

(b) unfairly discriminating against any person in this state by reason of his or her plan or method of transacting insurance, or by reason of his or her affiliation or nonaffiliation with any insurance organization; or

(c) establishing or perpetuating any condition in this state detrimental to free competition in the business of insurance or injurious to the insuring public.

(2) This section shall not apply relative to ocean marine and foreign trade insurances.

(3) This section shall not be deemed to prohibit the doing of things permitted to be done in accordance with the provisions of chapter 48.19 RCW of this code.

(4) Whenever the commissioner has knowledge of any violation of this section he or she shall forthwith order the offending person to discontinue such practice immediately or show cause to the satisfaction of the commissioner why such order should not be complied with. If the offender is an insurer or a licensee under this code and fails to comply with such order within thirty days after receipt thereof, the commissioner may forthwith revoke the offender's certificate of authority or licenses.