---
kind: "section"
citation: "40 C.F.R. § 1042.635"
title: "40"
number: "1042.635"
heading: "National security exemption."
url: "https://uscodex.org/cfr/40/1042.635"
---

# §1042.635. National security exemption.


Engines qualify for a national security exemption as described in [40 CFR 1068.225](/cfr/40/1068.225.md). This applies to both freshly manufactured and remanufactured engines.


## Notes

### Amendments

[81 FR 74151, Oct. 25, 2016]

### Authority

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

### Source

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

### Amendments

[81 FR 74151, Oct. 25, 2016]