Site Feedback

Title 40

Displaying title 40, up to date as of 10/07/2026. Title 40 was last amended 10/02/2026.
New Finding Aids are now available on eCFR.gov. The Parallel Table of Authorities, Subject Index, and Agency-prepared Indexes are now online! Learn more
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter BGrants and Other Federal Assistance33 – 49
Part 49Indian Country: Air Quality Planning and Management49.1 – 49.17810
Subpart MImplementation Plans for Tribes—Region X49.9861 – 49.17810
Implementation Plan for the Puyallup Tribe of the Puyallup Reservation, Washington49.10521 – 49.10550
§ 49.10521Identification of plan.
§ 49.10522Approval status.
§ 49.10523 Legal authority. [Reserved]
§ 49.10524 Source surveillance. [Reserved]
§ 49.10525Classification of regions for episode plans.
§ 49.10526Contents of implementation plan.
§ 49.10527 EPA-approved Tribal rules and plans. [Reserved]
§ 49.10528Permits to construct.
§ 49.10529Permits to operate.
§ 49.10530Federally-promulgated regulations and Federal implementation plans.
§§ 49.10531-49.10550 [Reserved]