---
kind: "section"
citation: "40 C.F.R. § 1045.101"
title: "40"
number: "1045.101"
heading: "What exhaust emission standards and requirements must my engines meet?"
url: "https://uscodex.org/cfr/40/1045.101"
---

# §1045.101. What exhaust emission standards and requirements must my engines meet?

- (a) You must show that your engines meet the following requirements:
  - (1) Outboard and personal watercraft engines must meet the exhaust emission standards specified in [§ 1045.103](/cfr/40/1045.103.md).
  - (2) Sterndrive/inboard engines must meet the exhaust emission standards specified in [§ 1045.105](/cfr/40/1045.105.md). You may optionally meet these standards earlier than we require, as specified in [§ 1045.145(b)](/cfr/40/1045.145.md?p=b).
  - (3) Sterndrive/inboard engines must meet the engine-diagnostic requirements in [§ 1045.110](/cfr/40/1045.110.md).
  - (4) All engines must meet the requirements in [§ 1045.115](/cfr/40/1045.115.md).
- (b) It is important that you read [§ 1045.145](/cfr/40/1045.145.md) to determine if there are other interim requirements or interim compliance provisions that apply for a limited time.

## Notes

### Authority

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

### Source

Source: 73 FR 59194, Oct. 8, 2008, unless otherwise noted.