# Harmonizing Schedule I Drug Requirements
> **Federal Motor Carrier Safety Administration** · Final rule. · Published 2012-01-30 · Effective 2012-02-29 · 77 FR 4479
## Document
- **Document number:** 2012-1905
- **Category:** motor-carrier
- **Sub-agency:** Federal Motor Carrier Safety Administration
- **Federal Register citation:** 77 FR 4479
- **CFR reference:** 49 CFR 382
- **Publication date:** 2012-01-30
- **Effective date:** 2012-02-29
- **DOT docket:** Docket No. FMCSA-2011-0073
## Abstract

The Federal Motor Carrier Safety Administration (FMCSA) amends the physical qualifications for drivers and the instructions for the medical examination report to clarify that drivers may not use Schedule I drugs and be qualified to drive commercial motor vehicles (CMVs) under any circumstances. The rule harmonizes FMCSA's provisions regarding pre-employment and return-to-duty test refusals with corresponding Department of Transportation (DOT)-wide provisions. Finally, the rule corrects inaccurate uses of the term "actual knowledge."

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/01/30/2012-1905/harmonizing-schedule-i-drug-requirements)
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