California Code, Probate Code - PROB § 224

If the insured and a beneficiary under a policy of life or accident insurance have died and it cannot be established by clear and convincing evidence that the beneficiary survived the insured, the proceeds of the policy shall be administered or distributed, or otherwise dealt with, as if the insured had survived the beneficiary, except if the policy is community or quasi-community property of the insured and the spouse of the insured and there is no alternative beneficiary except the estate or personal representative of the insured, the proceeds shall be distributed as community property under Section 103.