On February 26, 2018, the U.S. Environmental Protection Agency (EPA) published its proposed fees rule entitled User Fees for the Administration of the Toxic Substances Control Act (TSCA), as permissible under TSCA Section 26(b). 83 Fed. Reg. 8212. The rule as proposed will set user fees applicable to any person required to submit information to EPA under TSCA Section 4 or a notice, including an exemption or other information, to be reviewed by the Administrator under TSCA Section 5, or who manufactures (including imports) a chemical substance that is the subject of a risk evaluation under TSCA Section 6(b). The notice of proposed rulemaking provides a description of proposed TSCA fees and fee categories for fiscal years 2019, 2020, and 2021, and explains the methodology by which the proposed TSCA user fees were determined and would be determined for subsequent fiscal years. In proposing these new TSCA user fees, EPA also proposes amending long standing user fee regulations governing the review of premanufacture notices, exemption applications and notices, and significant new use notices. Comments on the proposed rule are due April 27, 2018.