Cal. Ins. Code § 922.3

Notwithstanding any other provision of law, credit for reinsurance, as either an asset or a deduction, shall not be allowed in any accounting or financial statement of the ceding insurer in respect to any so-called reinsurance contract unless, in such contract, the reinsurer undertakes to indemnify the ceding insurer, not only in form but in fact, against all or a part of the loss or liability arising out of the original insurance.