---
kind: "unit"
title: "10"
title_heading: "Energy"
key: "chII/subchE/part503"
level: "part"
label: "Part 503"
heading: "New Facilities"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/10/chII-subchE-part503"
sections_count: 30
---

# Part 503 — New Facilities

Title 10 C.F.R. — Energy › Chapter II — Department of Energy › Subchapter E — Alternate Fuels

## Contents

- [Subpart A — General Prohibition](/cfr/10/chII-subchE-part503-subpartA.md)
- [Subpart B — General Requirements for Exemptions](/cfr/10/chII-subchE-part503-subpartB.md)
- [Subpart C — Temporary Exemptions for New Facilities](/cfr/10/chII-subchE-part503-subpartC.md)
- [Subpart D — Permanent Exemptions for New Facilities](/cfr/10/chII-subchE-part503-subpartD.md)