U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 48Chapter 1Part 23Subpart 23.5 - Subpart 23.5—Greenhouse Gas Emissions
23.500 - 23.500 Scope of subpart.
23.501 - 23.501 Policy.
23.502 - 23.502 Solicitation provision.
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