---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchC/part52/subpartTT"
level: "subpart"
label: "Subpart TT"
heading: "Utah"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchC-part52-subpartTT"
sections_count: 20
---

# Subpart TT — Utah

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter C — Air Programs › Part 52 — Approval and Promulgation of Implementation Plans

## Sections

- [§52.2320. Identification of plan.](/cfr/40/52.2320.md)
- [§52.2321. Classification of regions.](/cfr/40/52.2321.md)
- [§52.2322. Extensions.](/cfr/40/52.2322.md)
- [§52.2323. Approval status.](/cfr/40/52.2323.md)
- [§52.2324. Original identification of plan.](/cfr/40/52.2324.md)
- [§52.2325-52.2330. Reserved](/cfr/40/52.2325-52.2330.md)
- [§52.2331. Attainment dates for national standards.](/cfr/40/52.2331.md)
- [§52.2332. Control strategy: Ozone.](/cfr/40/52.2332.md)
- [§52.2333. Legal authority.](/cfr/40/52.2333.md)
- [§52.2334-52.2345. Reserved](/cfr/40/52.2334-52.2345.md)
- [§52.2346. Significant deterioration of air quality.](/cfr/40/52.2346.md)
- [§52.2347. Stack height regulations.](/cfr/40/52.2347.md)
- [§52.2348. National Highway Systems Designation Act Motor Vehicle Inspection and Maintenance (I/M) Programs.](/cfr/40/52.2348.md)
- [§52.2350. Emission inventories.](/cfr/40/52.2350.md)
- [§52.2351. Area-wide nitrogen oxides (NO X ) exemption.](/cfr/40/52.2351.md)
- [§52.2352. Change to approved plan.](/cfr/40/52.2352.md)
- [§52.2353. Control strategy: Carbon monoxide.](/cfr/40/52.2353.md)
- [§52.2354. Interstate transport.](/cfr/40/52.2354.md)
- [§52.2355. Section 110(a)(2) infrastructure requirements.](/cfr/40/52.2355.md)
- [§52.2356. Interstate pollutant transport provisions; What are the FIP requirements for decreases in emissions of nitrogen oxides?](/cfr/40/52.2356.md)