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The Chemical Data Reporting (CDR) rule, under section 8(a) of the Toxic Substances Control Act (TSCA), requires manufacturers (including importers) to provide the EPA with information, including processing and use information, on chemical substances that they manufacture (including import) above threshold production volumes. The information is collected every four years and the production volume threshold for reporting a chemical substance is generally 25,000 pounds for a specific reporting year. Before the next reporting period of 2020, the EPA intends to revise the reporting requirements to better align with new statutory requirements resulting from TSCA as amended by the Frank. R. Lautenberg Chemical Safety for the 21st Century Act, address submitters' feedback following the 2016 submission period, and may consider reporting requirements for inorganic byproducts (RIN 2070-AK31). EPA is also proposing amendments to the size standards for small manufacturers, which impacts certain reporting and recordkeeping requirements for TSCA section 8(a) rules, including CDR; this change is being made in accordance with TSCA section 8(a)(3)(C) and EPA's determination that a revision to the current size standards is warranted.