CFR›Title 40›Chapter I›40 CFR Part 239 Citation40 CFR Part 239ContainsSubparts Subpart A–Subpart DCorpusDaily eCFRDisplayed edition2026-10-14Last updated2026-10-14 PART 239—REQUIREMENTS FOR STATE PERMIT PROGRAM DETERMINATION OF ADEQUACY Subparts Subpart A Subpart A—General Subpart B Subpart B—State Program Application Subpart C Subpart C—Requirements for Adequate Permit Programs Subpart D Subpart D—Adequacy Determination Procedures Authority42 U.S.C. 6912, 6945.Source63 FR 57040, Oct. 23, 1998, unless otherwise noted.