On June 22, 2016, President Obama signed into law the Frank R. Lautenberg Chemical Safety for the 21st Century Act which amends the Toxic Substance Control Act (TSCA), the nation’s primary chemicals management law. A summary of the new law is available at https://www.epa.gov/assessing-and-managing-chemicals-under-tsca/frank-r-lautenberg-chemical-safety-21st-century-act. This particular action involves revised TSCA section 8(a)(3)(C), which requires EPA, after consultation with the Administrator of the Small Business Administration, to review the adequacy of the standards for determining which manufacturers and processors qualify as small manufacturers and processors for purposes of TSCA sections 8(a)(1) and 8(a)(3). (Note that under TSCA section 3(9), manufacture includes import.) TSCA furthermore requires that (after consulting with the Small Business Administration and providing public notice and an opportunity for comment) EPA determine whether revision of the standards is warranted. For the reasons described below, EPA determines that revision of the standards is warranted.