Ala. Code § 27-5B-18
The reinsurance agreement may provide that the domiciliary liquidator of an insolvent ceding insurer shall give written notice to the assuming insurer of the pendency of a claim against the ceding insurer on the contract within a reasonable time after the claim is filed in the liquidation proceeding. During the pendency of the claim, any assuming insurer may investigate the claim and interpose, at its own expense, in the proceeding where the claim is to be adjudicated any defenses which it deems available to the ceding insurer, or its liquidator. The expense may be filed as a claim against the insolvent ceding insurer to the extent of a proportionate share of the benefit which may accrue to the ceding insurer solely as a result of the defense undertaken by the assuming insurer. Where two or more assuming insurers are involved in the same claim and a majority in interest elect to interpose a defense to the claim, the expense shall be apportioned in accordance with the terms of the reinsurance agreement as though the expense had been incurred by the ceding insurer.
Ala. Code § 27-5B-18 (1975)