On August 27, 2018, the U.S. Environmental Protection Agency (EPA) issued two direct final rules promulgating significant new use rules (SNUR) under the Toxic Substances Control Act (TSCA). The first direct final rule promulgates SNURs for ten chemical substances that were the subject of premanufacture notices (PMN). 83 Fed. Reg. 43527. The second direct final rule promulgates SNURs for 19 chemical substances that were the subject of PMNs. 83 Fed. Reg. 43538. In each rule, EPA notes that the chemical substances are subject to consent orders issued by EPA pursuant to TSCA Section 5(e). The direct final rules require persons who intend to manufacture (defined by statute to include import) or process any of these chemical substances for an activity that is designated as a significant new use to notify EPA at least 90 days before commencing that activity. The required notification will initiate EPA’s evaluation of the intended use within the applicable review period. Persons may not commence manufacture or processing for the significant new use until EPA has conducted a review of the notice, made an appropriate determination on the notice, and has taken such actions as are required with that determination. Both direct final rules will be effective on October 26, 2018. Written adverse comments on one or more of the SNURs must be received by September 26, 2018. If EPA receives written adverse comments, on one or more of these SNURs before September 26, 2018, EPA will withdraw the relevant sections of the direct final rules before their effective date. In addition to the direct final rules, EPA published proposed rules for both the direct final rules. 83 Fed. Reg. 43606, 83 Fed. Reg. 43607. Comments on the proposed rules are due September 26, 2018.