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Regulations last checked for updates: May 15, 2025
Title 40 - Protection of Environment last revised: Nov 15, 2025
All Titles
Title 40
Chapter I
Part 81
Subpart D - Subpart D—Identification of Mandatory Class I Federal Areas Where Visibility Is an Important Value
§ 81.400 - Scope.
§ 81.401 - Alabama.
§ 81.402 - Alaska.
§ 81.403 - Arizona.
§ 81.404 - Arkansas.
§ 81.405 - California.
§ 81.406 - Colorado.
§ 81.407 - Florida.
§ 81.408 - Georgia.
§ 81.409 - Hawaii.
§ 81.410 - Idaho.
§ 81.411 - Kentucky.
§ 81.412 - Louisiana.
§ 81.413 - Maine.
§ 81.414 - Michigan.
§ 81.415 - Minnesota.
§ 81.416 - Missouri.
§ 81.417 - Montana.
§ 81.418 - Nevada.
§ 81.419 - New Hampshire.
§ 81.420 - New Jersey.
§ 81.421 - New Mexico.
§ 81.422 - North Carolina.
§ 81.423 - North Dakota.
§ 81.424 - Oklahoma.
§ 81.425 - Oregon.
§ 81.426 - South Carolina.
§ 81.427 - South Dakota.
§ 81.428 - Tennessee.
§ 81.429 - Texas.
§ 81.430 - Utah.
§ 81.431 - Vermont.
§ 81.432 - Virgin Islands.
§ 81.433 - Virginia.
§ 81.434 - Washington.
§ 81.435 - West Virginia.
§ 81.436 - Wyoming.
§ 81.437 - New Brunswick, Canada.
authority:
42 U.S.C. 7401
,
source:
36 FR 22421, Nov. 25, 1971, unless otherwise noted.
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