On June 1, 2020, the EPA finalized the “Clean Water Act Section 401 Certification Rule” to implement the water quality certification process consistent with the text and structure of the CWA. The final rule published in the Federal Register on July 13, 2020, and will become effective on September 11, 2020.
https://www.epa.gov/cwa-401/clean-water-act-section-401-certification-rule
https://www.epa.gov/sites/production/files/2020-07/documents/clean_water_act_section_401_certification_rule.pdf
