California Code, Insurance Code - INS § 11625

If an insurer admitted to transact liability insurance fails to subscribe to the plan or to any amendments thereto, the commissioner shall give 10 days' written notice to such insurer to so subscribe. If such insurer fails to comply with such notice, then the commissioner may, after hearing upon notice, suspend the certificate of authority of such insurer to transact liability insurance in this State until such insurer does so subscribe. Proceedings under this section shall be conducted in accordance with Chapter 5, Part 1, Division 3, Title 2 of the Government Code,  1 and the commissioner shall have all the powers granted therein.