40 CFR § 702.13
Revision of designation
June 9, 2020
EPA may revise a final designation of a chemical substance from Low-Priority to High-Priority Substance at any time based on reasonably available information. To revise such a designation, EPA will re-initiate the prioritization process on that chemical substance in accordance with §702.7, re-screen the chemical substance and propose a priority designation pursuant to §702.9, and finalize the priority designation pursuant to §702.11.