California Code, Commercial Code - COM § 1307

(1) A bill of lading, policy or certificate of insurance, official weigher's or inspector's certificate, consular invoice, or any other document authorized or required by the contract to be issued by a third party is admissible as evidence of the facts stated in the document by the third party in any action arising out of the contract that authorized or required the document.

(2) In any action arising out of the contract that authorized or required the document referred to in subdivision (1):