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Regulations last checked for updates: May 14, 2025
Title 40 - Protection of Environment last revised: Apr 14, 2028
All Titles
Title 40
Chapter I
Part 93 - PART 93—DETERMINING CONFORMITY OF FEDERAL ACTIONS TO STATE OR FEDERAL IMPLEMENTATION PLANS
Subpart A [§ 93.100 - § 93.129] - Subpart A—Conformity to State or Federal Implementation Plans of Transportation Plans, Programs, and Projects Developed, Funded or Approved Under Title 23 U.S.C. or the Federal Transit Laws
Subpart B [§ 93.150 - § 93.165] - Subpart B—Determining Conformity of General Federal Actions to State or Federal Implementation Plans
authority:
42 U.S.C. 7401-7671q.
source:
58 FR 62235, Nov. 24, 1993, unless otherwise noted.
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