# Federal Motor Vehicle Safety Standards; Air Brake Systems Control Line Pressure Balance
> **National Highway Traffic Safety Administration** · Final rule; correction. · Published 1995-08-17 · Effective 1995-08-17 · 60 FR 42804
## Document
- **Document number:** 95-20345
- **Category:** fmvss
- **Sub-agency:** National Highway Traffic Safety Administration
- **Federal Register citation:** 60 FR 42804
- **CFR reference:** 49 CFR 571
- **Publication date:** 1995-08-17
- **Effective date:** 1995-08-17
- **DOT docket:** Docket No. 85-07
## Abstract

On July 28, 1995, NHTSA published a final rule that amended the control line pressure differential requirements in Standard No. 121, Air Brake Systems, for converter dollies and trailers designed to tow other air braked vehicles. The agency has since learned that the docket number in the heading of that document is incorrect. (60 FR 38762) Today's document corrects the docket number to read ``[Docket No. 85-07; Notice 11]''. The July 28, 1995 document had read ``[Docket No. 85-07; Notice 10]''.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1995/08/17/95-20345/federal-motor-vehicle-safety-standards-air-brake-systems-control-line-pressure-balance)
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