U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 97Subpart AAAA - Subpart AAAA—CAIR NOX Ozone Season Trading Program General Provisions
§ 97.301 - Purpose.
§ 97.302 - Definitions.
§ 97.303 - Measurements, abbreviations, and acronyms.
§ 97.304 - Applicability.
§ 97.305 - Retired unit exemption.
§ 97.306 - Standard requirements.
§ 97.307 - Computation of time.
§ 97.308 - Appeal procedures.
Appendix Appendix A - Appendix A to Subpart AAAA of Part 97—States With Approved State Implementation Plan Revisions Concerning Applicability
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