# Parts and Accessories Necessary for Safe Operation: Antilock Brake Systems
> **Federal Motor Carrier Safety Administration** · Direct final rule; confirmation of effective date. · Published 2010-11-03 · Effective 2010-11-22 · 75 FR 67634
## Document
- **Document number:** 2010-27799
- **Category:** motor-carrier
- **Sub-agency:** Federal Motor Carrier Safety Administration
- **Federal Register citation:** 75 FR 67634
- **CFR reference:** 49 CFR 393
- **Publication date:** 2010-11-03
- **Effective date:** 2010-11-22
- **DOT docket:** Docket No. FMCSA-2010-0186
## Abstract

The Federal Motor Carrier Safety Administration (FMCSA) confirms the effective date of the direct final rule titled "Parts and Accessories Necessary for Safe Operation: Antilock Brake Systems," published on September 21, 2010, in the Federal Register (75 FR 57393). This rule made permanent the existing requirement in the Federal Motor Carrier Safety Regulations that each trailer with an antilock brake system be equipped with an external malfunction indicator lamp.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/11/03/2010-27799/parts-and-accessories-necessary-for-safe-operation-antilock-brake-systems)
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