(a) A ceding insurer domiciled in this state may not take credit for insurance ceded to an insurer that is not authorized in Texas, accredited in Texas, trusteed in Texas, or certified in Texas, except as authorized under Insurance Code §493.104.(b) The funds held by or on behalf of the ceding insurer must be held as required under Insurance Code §493.104(b) and must be segregated from other operating accounts and securities invested by the ceding insurer. The segregated account must clearly acknowledge ownership by the company on whose annual statement these assets are listed. The ceding insurer must maintain at all times a subsidiary ledger detailing by each assuming insurer all transactions pertinent to each cash account or security held under the respective reinsurance agreements.