; and (III) a contingency plan to provide backup sites when necessary. (vi) A family assistance and customer care plan that addresses— (I) evacuee sheltering; (II) communication with families, victims, and evacuees; (III) food, water, and medication; (IV) emergency assistance; (V) personal item retrieval; (VI) language services; and (VII) the unique needs of international travelers. (C) In the case of a category X airport, an air transportation security program required under subparagraph (A) for the airport shall include, in addition to the requirements under subparagraph (B), an integrated and unified operations center responsible for overseeing and directing security operations for the entire airport that— (i) is based on a formalized concept of operations; and (ii) provides direction and resources through a unified command structure. (D) In the case of a category I, category II, category III, or category IV airport, an air transportation security program required under subparagraph (A) for the airport shall include, in addition to the requirements under subparagraph (B)— (i) a formalized concept of operations; and (ii) a unified command structure through which direction and resources are provided. . (b) Applicability In the case of an airport for which the Transportation Security Administration classification is changed after the date of the enactment of this Act, the airport shall be subject to the requirements applicable under subsection (c)(1) of section 44903 of title 49, United States Code, as amended by this section, applicable to the new classification category for the airport as of the date on which such classification is changed.