; and (ii) after the completion of hydraulic fracturing operations described in clause (i), the list of chemicals and proppants used in each underground injection during the operations (including identification of the chemical constituents of mixtures, Chemical Abstracts Service numbers for each chemical and constituent, material safety data sheets if available, and the amount of each chemical used). (B) Public availability The State or the Administrator, as applicable, shall— (i) ensure the accuracy and completeness of the information required under subparagraph (A); and (ii) make available to the public the information contained in each disclosure required under subparagraph (A), including by posting the information on a single, searchable Internet website such that all the information disclosed to the State or Administrator, as applicable, under that subparagraph is contained on the same Internet website. (C) Immediate disclosure in case of medical need or emergency (i) In general Subject to clause (ii), the regulations promulgated pursuant to subsection (a) shall require that, in any case in which the State or the Administrator, as applicable, a first responder, or healthcare practitioner determines that the proprietary chemical formula or specific chemical identity of a trade-secret chemical used in hydraulic fracturing is necessary for medical diagnosis, treatment, or emergency response, the applicable person using hydraulic fracturing shall, upon request, immediately disclose to the State, the Administrator, first responder, or healthcare practitioner the proprietary chemical formula or specific chemical identity of a trade-secret chemical, regardless of the existence of— (I) a written statement of need