CFR > Title 40 > Chapter I > Subchapter C > Part 97 > Subpart C CFR > Title 40 > Chapter I > Subchapter C > Part 97 > Subpart C – Permits Current as of: 2024 | Check for updates | Other versions § 97.20 General NOX Budget Trading Program permit requirements § 97.21 Submission of NOX Budget permit applications § 97.22 Information requirements for NOX Budget permit applications § 97.23 NOX Budget permit contents § 97.24 NOX Budget permit revisions