California Code, Insurance Code - INS § 706.5

The commissioner, in addition to any other proper ground for denying a certificate of authority to a nonadmitted insurer, may deny such certificate whenever, in his judgment, the investments of such insurer are not so made as to make available within a reasonable time sufficient moneys to meet promptly any demand which might in the ordinary course of events be properly made against the insurer.  In the case of an admitted insurer, whenever the commissioner finds such a condition to exist, he may order such insurer to cease to effect new contracts of insurance until its financial circumstances are changed sufficiently to remove such condition.  The commissioner may suspend or revoke the certificate of authority of any admitted insurer which fails to comply with such order.

The commissioner shall not issue such order under this section to any solvent admitted insurer if 25 per cent or more in value of the assets thereof is in cash or invested in the securities specified by sections 1171, 1172, 1173, 1174 and 1175, or in securities specified in sections 1191 and 1192 if such securities are listed on a securities exchange, subject to regulation, supervision, or control under a statute of the United States of America.  The provisions of this section likewise apply to reciprocal or interinsurance exchanges.