Cal. Ins. Code § 382
Covering notes may be issued to bind insurance temporarily pending the issuance of the policy. Within 90 days after issue of a covering note a policy shall be issued in lieu thereof, including within its terms the identical insurance bound under the covering note and premium therefor.
Covering notes may be extended or renewed beyond such 90 days with the written approval of the commissioner if the commissioner determines that such extension is not contrary to and is not for the purpose of violating any provision of this code. The commissioner may promulgate rules and regulations governing such extensions for the purpose of preventing such violations and may by such rules and regulations dispense with the requirement of written approval by him in the case of extensions in compliance with such rules and regulations.
Ca. Ins. Code § 382