In the case of the occurrence of a major disaster, as defined in section 5122 of this title, that may have resulted in flood damage covered under the national flood insurance program established under this chapter and other personal lines residential property insurance coverage offered by a State regulated insurer, upon a request made by the insurance commissioner of a State (or such other official responsible for regulating the business of insurance in the State) for the participation of representatives of the Administrator in a program sponsored by such State for nonbinding mediation of insurance claims resulting from a major disaster, the Administrator shall cause representatives of the national flood insurance program to participate in such a State program where claims under the national flood insurance program are involved to expedite settlement of flood damage claims resulting from such disaster.