# Federal Motor Vehicle Safety Standards: Occupant Crash Protection
> **National Highway Traffic Safety Administration** · Final rule. · Published 2011-08-29 · Effective 2011-12-27 · 76 FR 53648
## Document
- **Document number:** 2011-21946
- **Category:** fmvss
- **Sub-agency:** National Highway Traffic Safety Administration
- **Federal Register citation:** 76 FR 53648
- **CFR reference:** 49 CFR 571
- **Publication date:** 2011-08-29
- **Effective date:** 2011-12-27
- **DOT docket:** Docket No. NHTSA-2008-0149
## Abstract

This final rule amends the Federal motor vehicle safety standard (FMVSS) on occupant crash protection to remove the sunset of a requirement that a vehicle's lap belt must be lockable, without the use of special tools, to tightly secure a child restraint system (CRS). We refer to this as the "lockability" requirement. Under the current standard, the lockability requirement ceases to apply to seating positions that are equipped with a child restraint anchorage system (commonly referred to as a "LATCH" system) on vehicles manufactured on or after September 1, 2012. Because data indicate that motorists are still using lockable belts to install CRSs even in seating positions with LATCH, there is a continuing need for the lockability requirement even in seating positions with LATCH. Thus, this final rule ensures that the lockability requirement continues in effect for all seating positions past September 1, 2012.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/08/29/2011-21946/federal-motor-vehicle-safety-standards-occupant-crash-protection)
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