CFR › Title 49 › Part 523 › §523.949 CFR §523.9Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkTruck 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.