Cal. INS § 1853.8

Agreements may be made among admitted insurers with respect to the equitable apportionment among them of casualty insurance which may be afforded applicants who are in good faith entitled to but who are unable to procure such insurance through ordinary methods, and with respect to the use of reasonable rate modifications for such insurance, such agreements to be subject to the approval of the commissioner.

All such agreements shall be submitted in writing to the commissioner for his consideration and approval, together with such information as he may reasonably require. The commissioner shall approve only such agreements as are found by him to contemplate (a) the use of rates which meet the standards prescribed by this chapter and (b) activities and practices that are not unfair, unreasonable or otherwise inconsistent with the provisions of this chapter.

At any time after such agreements are in effect the commissioner may review the practices and activities of the adherents to such agreements and if after a hearing upon not less than 10 days notice to such adherents he finds that any such practice or activity is unfair or unreasonable, or is otherwise inconsistent with the provisions of this chapter, he may issue a written order to the parties to any such agreement specifying in what respects such act or practice is unfair or unreasonable or otherwise inconsistent with the provisions of this chapter and requiring the discontinuance of such activity or practice. For good cause, and after hearing upon not less than 10 days notice to the adherents thereto, the commissioner may revoke approval of any such agreement.