; and (2) in accordance with the amendment made by subsection (a), communicate with emergency response providers with a need to know (within the meaning of section 27.400(e) of title 6, Code of Federal Regulations, or any successor thereto) in a secure and expeditious manner in order to inform the emergency response providers that covered chemical facilities exist in the locations in which the emergency response providers operate. 16. Amendments relating to Appendix A of part 27 of title 6, United States Code (a) Specific products and mixtures containing chemicals of interest Section 2102(e) of the Homeland Security Act of 2002 ( 6 U.S.C. 622(e) ), as amended by section 15 of this Act, is amended by adding at the end the following: (7) Specific products and mixtures containing chemicals of interest (A) Definition In this paragraph, the term covered product or mixture means a specific product or mixture that contains a chemical of interest at or above the minimum concentration listed under Appendix A to part 27 of title 6, Code of Federal Regulations, or any successor thereto. (B) Exclusion Subject to the regulations prescribed under subparagraph (C), the Secretary may exclude a covered product or mixture from the designation as a chemical of interest for the purposes of the definition of the term chemical facility of interest if the Secretary determines that the covered product or mixture does not present the same security concern on the basis of which the chemical of interest contained in the covered product or mixture was designated as a chemical of interest. (C) Regulations (i) Authority to prescribe Not later than 1 year after the date of enactment of the Protecting and Securing Chemical Facilities from Terrorist Attacks Act of 2020 , the Secretary shall prescribe regulations, including guidance as necessary, under which— (I) an interested party may petition the Secretary for exclusion of a covered product or mixture under subparagraph (B)