# Gross Combination Weight Rating; Definition
> **Federal Motor Carrier Safety Administration** · Final rule. · Published 2014-03-19 · Effective 2014-04-18 · 79 FR 15245
## Document
- **Document number:** 2014-05502
- **Category:** motor-carrier
- **Sub-agency:** Federal Motor Carrier Safety Administration
- **Federal Register citation:** 79 FR 15245
- **CFR reference:** 49 CFR 383
- **Publication date:** 2014-03-19
- **Effective date:** 2014-04-18
- **DOT docket:** Docket No. FMCSA-2012-0156
## Abstract

FMCSA amends the Federal Motor Carrier Safety Regulations (FMCSRs) by revising the definition of "gross combination weight rating" (or GCWR) to clarify the applicability of the Agency's safety regulations for single-unit trucks (vehicles other than truck tractors) when they are towing trailers, and the GCWR information is not included on the vehicle manufacturer's certification label.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/03/19/2014-05502/gross-combination-weight-rating-definition)
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