# Federal Motor Vehicle Safety Standards: Anti-Ejection Glazing for Bus Portals; Mandatory Applicability Beginning October 30, 2027
> **National Highway Traffic Safety Administration** · Final rule; partial grant of a petition for reconsideration. · Published 2026-01-15 · Effective 2026-01-15 · 91 FR 1709
## Document
- **Document number:** 2026-00728
- **Category:** fmvss
- **Sub-agency:** National Highway Traffic Safety Administration
- **Federal Register citation:** 91 FR 1709
- **CFR reference:** 49 CFR 571
- **Publication date:** 2026-01-15
- **Effective date:** 2026-01-15
- **DOT docket:** Docket No. NHTSA-2026-0001
## Abstract

This document partially grants a petition for reconsideration of the October 30, 2024 final rule that established Federal Motor Vehicle Safety Standard (FMVSS) No. 217a, "Anti-ejection glazing for bus portals; Mandatory applicability beginning October 30, 2027." The standard intends to drive installation of advanced glazing in over-the- road buses (motorcoaches) and other large buses to reduce occupant ejections. This final rule revises the minimum size requirement for applicable portals, adds a figure to illustrate a daylight opening periphery, and clarifies the target location for edge impact tests. This document denies all other portions of the petition for reconsideration, including revising the definition of "daylight opening."

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/01/15/2026-00728/federal-motor-vehicle-safety-standards-anti-ejection-glazing-for-bus-portals-mandatory-applicability)
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