---
kind: "section"
citation: "30 C.F.R. § 7.90"
title: "30"
number: "7.90"
heading: "Approval marking."
url: "https://uscodex.org/cfr/30/7.90"
---

# §7.90. Approval marking.


Each approved diesel engine shall be identified by a legible and permanent approval marking inscribed with the assigned MSHA approval number and securely attached to the diesel engine. The marking shall also contain the following information:

- (a) **Ventilation rate.**
- (b) **Rated power.**
- (c) **Rated speed.**
- (d) **High idle.**
- (e) **Maximum altitude before deration.**
- (f) **Engine model number.**

## Notes

### Source

Source: 61 FR 55504, Oct. 25, 1996, unless otherwise noted.

### Authority

Authority: 30 U.S.C. 957.

### Source

Source: 53 FR 23500, June 22, 1988, unless otherwise noted.