49 CFR § 523.9 - Truck tractors.
---
identifier: "/us/cfr/t49/s523.9"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 523.9 - Truck tractors."
title_number: 49
title_name: "Transportation"
section_number: "523.9"
section_name: "Truck tractors."
chapter_name: "NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "523"
part_name: "VEHICLE CLASSIFICATION"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 32901; delegation of authority at 49 CFR 1.95."
cfr_part: "523"
---
# 523.9 Truck tractors.
Truck tractors for the purpose of this part are considered as any truck tractor as defined in 49 CFR part 571 having a GVWR above 26,000 pounds.
[76 FR 57492, Sept. 15, 2011]