California Code, Insurance Code - INS § 12096

(a) Any applicant for a contractor's license or performance bond who believes that the admitted surety insurer, regularly issuing such bonds, to whom he has applied did not comply with Section 12095, may file a complaint in writing with the commissioner. If the commissioner finds that there is reasonable ground to believe that the alleged discrimination has occurred, he may set the complaint for hearing, after notice, at which hearing each of the parties to the complaint shall have an opportunity to be heard in person or through their witnesses.

(b) Any determination of the commissioner upon such complaint and hearing shall be judicially reviewable.