US Codex
C.F.R.
Legal Codes
United States Code
U.S.C.
Federal statutory law
Code of Federal Regulations
C.F.R.
Federal administrative regulations (eCFR)
Browse by date
View an earlier version
Go
Latest
2026-08-27
Browse all versions by date
Notes
Notes
Browse by date
About
Privacy
MCP
…
/
Code of Federal Regulations
/
Title 40
/
Chapter I — Environmental Protection Agency
/
Subchapter C — Air Programs
/
Part 51 — Requirements for Preparation, Adoption, and Submittal of Implementation Plans
/
Subpart W — Determining Conformity of General Federal Actions to State or Federal Implementation Plans
‹
Subpt. U
Economic Incentive Programs
Subpt. X
Provisions for Implementation of 8-hour Ozone National Ambient Air Quality Standard
›
Subpart W — Determining Conformity of General Federal Actions to State or Federal Implementation Plans
Search Subpart W full text →
§51.850
Reserved
§51.851
State implementation plan (SIP) or Tribal implementation plan (TIP) revision.
§51.852-51.860
Reserved
‹
Subpt. U
Economic Incentive Programs
Subpt. X
Provisions for Implementation of 8-hour Ozone National Ambient Air Quality Standard
›
Add note
Incoming references
Copy permalink
Cite
Cite this provision
×
Format
Bluebook
ALWD
APA
MLA
Include provision text
Copy citation
Incoming references
×
Open in new tab
✕