(1) The department may revoke a certificate of manufactured home installation upon the following grounds:

(a) The certificate was obtained through error or fraud;

(b) The holder of the certificate is judged to be incompetent as a result of multiple infractions of the state installation requirements, WAC 296-150I-0300 through 296-150I-0410; or

(c) The holder has violated a provision of this chapter or a rule adopted to implement this chapter.

(2) Before a certificate of manufactured home installation is revoked, the holder must be given written notice of the department's intention to revoke the certificate, sent using a method by which the mailing can be tracked or the delivery can be confirmed to the holder's last known address. The notice shall enumerate the allegations against the holder, and shall give the holder the opportunity to request a hearing. At the hearing, the department and the holder may produce witnesses and give testimony. The hearing shall be conducted in accordance with the provisions of chapter 34.05 RCW.