---
kind: "section"
citation: "40 C.F.R. § 86.404-78"
title: "40"
number: "86.404-78"
heading: "Section numbering."
url: "https://uscodex.org/cfr/40/86.404-78"
---

# §86.404-78. Section numbering.

- (a) **The year of initial applicability of a section is indicated by its section number.** The two digits following the hyphen designate the first model year for which a section is effective. A section remains effective until superseded.
- (b) **A reference to a section without a year designation implies the appropriate model year.**

## Notes

### Source

Source: 42 FR 1126, Jan. 5, 1977, unless otherwise noted.

### Authority

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