---
kind: "section"
citation: "40 C.F.R. § 610.60"
title: "40"
number: "610.60"
heading: "Non-standard ambient conditions."
url: "https://uscodex.org/cfr/40/610.60"
---

# §610.60. Non-standard ambient conditions.

- (a) **Extreme temperatures.** For vehicles required to be tested at extreme temperatures, the test sequence described in [§ 610.41](/cfr/40/610.41.md) will be performed using either test track or dynamometer, in ambient temperatures outside the 60° to 90° range specified in [§ 610.64](/cfr/40/610.64.md) as determined by the Administrator. The driveability tests described in [§ 610.62](/cfr/40/610.62.md) may also be performed at non-standard temperatures, as determined to be necessary by the Administrator.
- (b) **High altitudes.** Vehicles required to be tested at high altitudes will undergo the tests described in [§ 610.43](/cfr/40/610.43.md) if necessary, on either test track or dynamometer as determined by the Administrator. One test location, at an elevation of no less than 4000 feet, will be selected.

## Notes

### Authority

Authority: Sec. 511, Motor Vehicle Information and Cost Savings Act, as amended (sec. 301, Pub. L. 94-163, 89 Stat. 915 (15 U.S.C. 2011)).

### Source

Source: 44 FR 17946, Mar. 23, 1979, unless otherwise noted.