---
kind: "section"
citation: "40 C.F.R. § 1037.231"
title: "40"
number: "1037.231"
heading: "Powertrain families."
url: "https://uscodex.org/cfr/40/1037.231"
---

# §1037.231. Powertrain families.


See [40 CFR 1036.231](/cfr/40/1036.231.md) for provisions describing how to divide your product line into powertrain families.


## Notes

### Amendments

[91 FR 7790, Feb. 18, 2026]

### Authority

Authority: 42 U.S.C. 7401—7671q.

### Source

Source: 81 FR 74048, Oct. 25, 2016, unless otherwise noted.

### Amendments

[91 FR 7790, Feb. 18, 2026]