---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchQ"
level: "subchap"
label: "Subchapter Q"
heading: "Energy Policy"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchQ"
sections_count: 78
---

# Subchapter Q — Energy Policy

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency

## Contents

- [Part 600 — Fuel Economy and Greenhouse Gas Exhaust Emissions of Motor Vehicles](/cfr/40/chI-subchQ-part600.md)
- [Part 610 — Fuel Economy Retrofit Devices](/cfr/40/chI-subchQ-part610.md)
- [Part 611-699 — Parts 611-699 [reserved]](/cfr/40/chI-subchQ-part611-699.md)