Under RCW 48.12.425, the commissioner shall allow credit for reinsurance ceded by a domestic insurer to an assuming insurer which, as of any date on which statutory financial statement credit for reinsurance is claimed, and thereafter for so long as credit for reinsurance is claimed, maintains a trust fund in an amount prescribed in WAC 284-13-530 through 284-13-538 in a qualified United States financial institution as defined in RCW 48.12.465(2), for the payment of the valid claims of its United States domiciled ceding insurers, their assigns and successors in interest. The assuming insurer must report annually to the commissioner substantially the same information as that required to be reported on the NAIC annual statement form by licensed insurers, to enable the commissioner to determine the sufficiency of the trust fund.