(1) That any rate, rating plan, or rating system violates the applicable provisions of this chapter, he may issue an order to the insurer or rating organization which has been the subject of the hearing specifying in what respects the violation exists and stating when, within a reasonable period of time, the further use of the rate or rating system by the insurer or rating organization in contracts of insurance made thereafter shall be prohibited and may further order that the portion of premiums received from current policyholders as a result of the most recent rate increase at the time the notice of such hearing is issued shall be refunded to the policyholders;

(2) That an insurer, rating organization, advisory organization, or a group, association, or other organization of insurers which engages in joint underwriting or joint reinsurance is in violation of the provisions of this chapter applicable to it other than the provisions dealing with rates, rating plans, or rating system, he may issue an order to the insurer, organization, group, or association which has been the subject of the hearing specifying in what respects the violation exists and requiring compliance within a reasonable time thereafter;

(3) That the violation of this chapter applicable to it by any insurer or rating organization which has been the subject of the hearing was willful, he may suspend or revoke, in whole or in part, the certificate of authority of each insurer or the license of each rating organization with respect to the class of insurance which has been the subject matter of the hearing;

(4) That any rating organization has willfully engaged in any fraudulent or dishonest act or practices, he may suspend or revoke, in whole or in part, the license of the organization in addition to any other penalty provided in this chapter.