23 CFR § 669.1 - Scope and purpose.

---
identifier: "/us/cfr/t23/s669.1"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "23 CFR § 669.1 - Scope and purpose."
title_number: 23
title_name: "Highways"
section_number: "669.1"
section_name: "Scope and purpose."
chapter_name: "FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "G"
subchapter_name: "ENGINEERING AND TRAFFIC OPERATIONS"
part_number: "669"
part_name: "ENFORCEMENT OF HEAVY VEHICLE USE TAX"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "23 U.S.C. 141(c) and 315; 49 CFR 1.85."
regulatory_source: "51 FR 25364, July 14, 1986, unless otherwise noted."
cfr_part: "669"
---


# 669.1 Scope and purpose.

To prescribe requirements for certification by the states that evidence of proof of payment is obtained either before vehicles subject to the Federal heavy vehicle use tax are lawfully registered or within 4 months after being lawfully registered if a suspension registration system is implemented.