---
kind: "unit"
title: "23"
title_heading: "Highways"
key: "chI/subchG/part669"
level: "part"
label: "Part 669"
heading: "Enforcement of Heavy Vehicle Use Tax"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/23/chI-subchG-part669"
sections_count: 11
---

# Part 669 — Enforcement of Heavy Vehicle Use Tax

Title 23 C.F.R. — Highways › Chapter I — Federal Highway Administration, Department of Transportation › Subchapter G — Engineering and Traffic Operations

## Sections

- [§669.1. Scope and purpose.](/cfr/23/669.1.md)
- [§669.3. Policy.](/cfr/23/669.3.md)
- [§669.5. Objective.](/cfr/23/669.5.md)
- [§669.7. Certification requirement.](/cfr/23/669.7.md)
- [§669.9. Certification content.](/cfr/23/669.9.md)
- [§669.11. Certification submittal.](/cfr/23/669.11.md)
- [§669.13. Effect of failure to certify or to adequately obtain proof-of-payment.](/cfr/23/669.13.md)
- [§669.15. Procedure for the reduction of funds.](/cfr/23/669.15.md)
- [§669.17. Compliance finding.](/cfr/23/669.17.md)
- [§669.19. Reservation and reapportionment of funds.](/cfr/23/669.19.md)
- [§669.21. Procedure for evaluating state compliance.](/cfr/23/669.21.md)