---
kind: "section"
citation: "40 C.F.R. § 1042.625"
title: "40"
number: "1042.625"
heading: "Special provisions for engines used in emergency applications."
url: "https://uscodex.org/cfr/40/1042.625"
---

# §1042.625. Special provisions for engines used in emergency applications.


This section describes an exemption that is available for certain Category 1 and Category 2 engines. This exemption is not available for Category 3 engines.

- (a) Except as specified in [paragraph (d)](#d) of this section, the prohibitions in [§ 1068.101(a)(1)](/cfr/40/1068.101.md?p=a-1) do not apply to a new engine that is subject to Tier 4 standards if the following conditions are met:
  - (1) **The engine is intended for installation in one of the following vessels or applications—**
    - (i) A lifeboat approved by the U.S. Coast Guard under approval series 160.135 (see for example [46 CFR 199.201(a)(1)](/cfr/46/199.201.md?p=a-1)), as long as such a vessel is not also used as a launch or tender.
    - (ii) A rescue boat approved by the U.S. Coast Guard under approval series 160.156 (see for example [46 CFR 199.202(a)](/cfr/46/199.202.md?p=a)).
    - (iii) Generator sets or other auxiliary equipment that qualify as final emergency power sources under [46 CFR part 112](/cfr/46/part112.md).
  - (2) The engine meets the Tier 3 emission standards specified in [§ 1042.101](/cfr/40/1042.101.md) as specified in [40 CFR 1068.265](/cfr/40/1068.265.md).
  - (3) The engine is used only for its intended purpose, as specified on the emission control information label.
- (b) Except as specified in [paragraph (d)](#d) of this section, the prohibitions in [§ 1068.101(a)(1)](/cfr/40/1068.101.md?p=a-1) do not apply to a new engine that is subject to Tier 3 standards according to the following provisions:
  - (1) The engine must be intended for installation in a lifeboat or a rescue boat as specified in paragraph [(a)(1)(i)](#a-1-i) or [(ii)](#a-1-ii) of this section.
  - (2) This exemption is available from the initial effective date for the Tier 3 standards until the engine model (or one of comparable size, weight, and performance) has been certified as complying with the Tier 3 standards and Coast Guard requirements.
  - (3) The engine must meet the Tier 2 emission standards specified in Appendix I of this part as specified in [40 CFR 1068.265](/cfr/40/1068.265.md).
- (c) If you introduce an engine into U.S. commerce under this section, you must meet the labeling requirements in [§ 1042.135](/cfr/40/1042.135.md), but add one of the following statements instead of the compliance statement in [§ 1042.135(c)(10)](/cfr/40/1042.135.md?p=c-10):
  - (1) **For lifeboats and rescue boats, add the following statement—**
  - (2) **For engines serving as final emergency power sources, add the following statement—**
- (d) Introducing into commerce a vessel containing an engine exempted under this section violates the prohibitions in [40 CFR 1068.101(a)(1)](/cfr/40/1068.101.md?p=a-1) where the vessel is not covered by paragraph [(a)](#a) or [(b)](#b) of this section, unless it is exempt under a different provision. Similarly, using such an engine or vessel as something other than a lifeboat, rescue boat, or emergency engine as specified in [paragraph (a)(1)](#a-1) of this section violates the prohibitions in [40 CFR 1068.101(a)(1)](/cfr/40/1068.101.md?p=a-1), unless it is exempt under a different provision.

## Notes

### Amendments

[73 FR 37243, June 30, 2008, as amended at 75 FR 23006, Apr. 30, 2010]

### Authority

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

### Source

Source: 73 FR 37243, June 30, 2008, unless otherwise noted.

### Amendments

[73 FR 37243, June 30, 2008, as amended at 75 FR 23006, Apr. 30, 2010]