---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchU/part1048"
level: "part"
label: "Part 1048"
heading: "Control of Emissions from New, Large Nonroad Spark-Ignition Engines"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchU-part1048"
sections_count: 65
---

# Part 1048 — Control of Emissions from New, Large Nonroad Spark-Ignition Engines

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter U — Air Pollution Controls

## Contents

- [Subpart A — Overview and Applicability](/cfr/40/chI-subchU-part1048-subpartA.md)
- [Subpart B — Emission Standards and Related Requirements](/cfr/40/chI-subchU-part1048-subpartB.md)
- [Subpart C — Certifying Engine Families](/cfr/40/chI-subchU-part1048-subpartC.md)
- [Subpart D — Testing Production-line Engines](/cfr/40/chI-subchU-part1048-subpartD.md)
- [Subpart E — Testing In-use Engines](/cfr/40/chI-subchU-part1048-subpartE.md)
- [Subpart F — Test Procedures](/cfr/40/chI-subchU-part1048-subpartF.md)
- [Subpart G — Compliance Provisions](/cfr/40/chI-subchU-part1048-subpartG.md)
- [Subpart H — Subpart H [Reserved]](/cfr/40/chI-subchU-part1048-subpartH.md)
- [Subpart I — Definitions and Other Reference Information](/cfr/40/chI-subchU-part1048-subpartI.md)