California Code, Insurance Code - INS § 11621.5

(a) In the event proceedings have been initiated by the commissioner to have an insurer declared insolvent, and a receiver or liquidator has been appointed, the plan shall reimburse any insured of that insurer for the unearned premium on any assigned risk policy then in force, upon submission of satisfactory evidence from the insured that the policy was in force at the time of the declaration of insolvency and that the requisite premium had been paid.

(b) The amount expended by the plan to remit unearned premium to insureds shall be deemed a cost of administration of the plan and shall be apportioned as provided in the plan adopted and approved pursuant to this article.  The plan shall be subrogated in the liquidation proceedings to the right of reimbursement of all insureds to whom unearned premium has been remitted.  In the event that the insurer is subsequently found by the court not to be insolvent, the proceedings are dismissed, and the receiver or liquidator has been discharged, the insurer shall be assessed by the plan for the total amount expended by the plan for return of unearned premiums.