---
kind: "section"
citation: "40 C.F.R. § 1042.520"
title: "40"
number: "1042.520"
heading: "What testing must I perform to establish deterioration factors?"
url: "https://uscodex.org/cfr/40/1042.520"
---

# §1042.520. What testing must I perform to establish deterioration factors?


Sections [1042.240](/cfr/40/1042.240.md) and [1042.245](/cfr/40/1042.245.md) describe the required methods for testing to establish deterioration factors for an engine family.


## Notes

### Authority

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

### Source

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