Cal. INS § 6047

Except as provided in this section, such insurer shall not issue policies to an amount in excess of six thousand dollars ($6,000) on any one risk, whether under one or more policies, without immediately reinsuring the excess amount in some other insurer. Any such insurer having more than ten million dollars ($10,000,000) direct insurance in force as shown by its books may, for each one million dollars ($1,000,000) in excess of ten million dollars ($10,000,000), write five hundred dollars ($500) additional insurance in excess of six thousand dollars ($6,000) on each such risk; provided, however, that any such insurer 90 percent of whose business in force is reinsurance assumed and which has more than ten million dollars ($10,000,000) gross insurance in force may, for each one million dollars ($1,000,000) in excess of ten million dollars ($10,000,000), write five hundred dollars ($500) additional insurance in excess of six thousand dollars ($6,000) on each such risk. Any such insurer issuing nonassessable policies as provided in Section 7015 (c) (3) hereof, may issue policies in accordance with Section 3080 of this code.