On December 27, 2016, U.S. Customs and Border Protection (CBP) published a Final Rule in the Federal Register announcing amendments to CBP regulations regarding the requirement to file a Toxic Substances Control Act (TSCA) certification when importing into the customs territory of the United States chemicals in bulk form or as part of mixtures and articles containing a chemical or mixture. That document amended the regulations to establish an electronic option for importers to file the required U.S. Environmental Protection Agency (EPA) TSCA certifications, to clarify and add certain definitions, and to eliminate the paper-based blanket certification process. The changes announced in that Final Rule were to be effective January 26, 2017. This notice announces that the effective date of the Final Rule is delayed for 60 days from January 20, 2017.