On May 15, 2023, the Environmental Protection Agency (EPA) issued a proposed rule titled, ``National Emission Standards for Hazardous Air Pollutants: Taconite Iron Ore Processing Amendments.'' The EPA is extending the comment period on this proposed rule that currently closes on June 29, 2023, by 8 days. The comment period will now remain open until July 7, 2023, to allow additional time for stakeholders to review and comment on the proposal.