---
kind: "section"
citation: "40 C.F.R. § 1048.10"
title: "40"
number: "1048.10"
heading: "How is this part organized?"
url: "https://uscodex.org/cfr/40/1048.10"
---

# §1048.10. How is this part organized?


This part 1048 is divided into the following subparts:

- (a) [Subpart A](/cfr/40/subpartA.md) of this part defines the applicability of [part 1048](/cfr/40/part1048.md) and gives an overview of regulatory requirements.
- (b) [Subpart B](/cfr/40/subpartB.md) of this part describes the emission standards and other requirements that must be met to certify engines under this part. Note that [§ 1048.145](/cfr/40/1048.145.md) discusses certain interim requirements and compliance provisions that apply only for a limited time.
- (c) **Subpart C of this part describes how to apply for a certificate of conformity.**
- (d) **Subpart D of this part describes general provisions for testing production-line engines.**
- (e) **Subpart E of this part describes general provisions for testing in-use engines.**
- (f) [Subpart F](/cfr/40/subpartF.md) of this part describes how to test your engines (including references to other parts of the Code of Federal Regulations).
- (g) [Subpart G](/cfr/40/subpartG.md) of this part and [40 CFR part 1068](/cfr/40/part1068.md) describe requirements, prohibitions, and other provisions that apply to engine manufacturers, equipment manufacturers, owners, operators, rebuilders, and all others.
- (h) [Reserved]
- (i) **Subpart I of this part contains definitions and other reference information.**

## Notes

### Amendments

[70 FR 40465, July 13, 2005, as amended at 73 FR 59232, Oct. 8, 2008]

### Authority

Authority: 42 U.S.C. 7401-7671q.

### Source

Source: 67 FR 68347, Nov. 8, 2002, unless otherwise noted.

### Amendments

[70 FR 40465, July 13, 2005, as amended at 73 FR 59232, Oct. 8, 2008]