# Operating Under the Influence of Alcohol or Drugs
> **National Park Service** · Final rule. · Published 2003-08-06 · Effective 2003-09-05 · 68 FR 46477
## Document
- **Document number:** 03-19965
- **Category:** park-regulation
- **Sub-agency:** National Park Service
- **Federal Register citation:** 68 FR 46477
- **CFR reference:** 36 CFR 4
- **Publication date:** 2003-08-06
- **Effective date:** 2003-09-05
## Abstract

This rule revises the National Park Service (NPS) regulation governing motor vehicle operation under the influence of alcohol. The revision is in response to a Presidential directive issued to all Federal agencies to promulgate regulations adopting a 0.08 blood alcohol concentration (BAC) as the legal limit for a per se impaired driving offense. This rule will assist in preventing tragic and unnecessary alcohol-related deaths and injuries on our Nation's roads.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/08/06/03-19965/operating-under-the-influence-of-alcohol-or-drugs)
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