On February 24, 2015, the Environmental Protection Agency (EPA) published a direct final rule approving the updated delegation of EPA authority for implementation and enforcement of National Emission Standards for Hazardous Air Pollutants (NESHAPs) for all sources (both part 70 and non-part 70 sources) to the Oklahoma Department of Environmental Quality (ODEQ). The direct final rule was published without prior proposal because EPA anticipated no adverse comments. EPA stated in the direct final rule that if EPA received relevant, adverse comments by March 26, 2015, EPA would publish a timely withdrawal in the Federal Register. EPA received a relevant, adverse comment on March 25, 2015, and accordingly is withdrawing the direct final rule, and in a separate subsequent final rulemaking will address the comment received.