---
kind: "section"
citation: "40 C.F.R. § 1068.2"
title: "40"
number: "1068.2"
heading: "How does this part apply for engines and how does it apply for equipment?"
url: "https://uscodex.org/cfr/40/1068.2"
---

# §1068.2. How does this part apply for engines and how does it apply for equipment?

- (a) **See the standard-setting part to determine if engine-based and/or equipment-based standards apply.** (Note: Some equipment is subject to engine-based standards for exhaust emission and equipment-based standards for evaporative emissions.)
- (b) The provisions of this part apply differently depending on whether the engine or equipment is required to be certified.
  - (1) Subpart A and subpart B of this part apply to engines and equipment, without regard to which is subject to certification requirements in the standard-setting part.
  - (2) Subparts C, D, and E of this part apply to the engines or to the equipment, whichever is subject to certification requirements in the standard-setting part.
  - (3) [Subpart F](/cfr/40/subpartF.md) of this part generally applies to the engines or to the equipment, whichever is subject to standards under the standard-setting part. However, since [subpart F](/cfr/40/subpartF.md) of this part addresses in-use engines and equipment (in which the engine is installed in the equipment), the requirements do not always distinguish between engines and equipment.
- (c) For issues related to testing, read the term “engines/equipment” to mean engines for engines subject to engine-based testing and equipment for equipment subject to equipment-based testing; otherwise, read the term “engines/equipment” to mean engines for sources subject to engine-based standards and equipment for sources subject to equipment-based standards.
- (d) When we use the term engines (rather than engines/equipment), read it to mean engines without regard to whether the source is subject to engine-based standards or testing. When we use the term equipment (rather than engines/equipment), read it to mean equipment without regard to whether the source is subject to equipment-based standards or testing. (Note: The definition of “equipment” in [§ 1068.30](/cfr/40/1068.30.md) includes the engine.)
- (e) The terminology convention described in this section is not intended to limit our authority or your obligations under the Clean Air Act.

## Notes

### Authority

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

### Source

Source: 73 FR 59344, Oct. 8, 2008, unless otherwise noted.