# Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles-Phase 2
> **US Department of Transportation** · Rule · Published 2017-06-30 · 82 FR 29761
## Document
- **Document number:** C1-2016-21203
- **Category:** other
- **Sub-agency:** US Department of Transportation
- **Federal Register citation:** 82 FR 29761
- **CFR reference:** 40 CFR 9
- **Publication date:** 2017-06-30
- **DOT docket:** EPA-HQ-OAR-2014-0827
## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/06/30/C1-2016-21203/greenhouse-gas-emissions-and-fuel-efficiency-standards-for-medium--and-heavy-duty-engines-and)
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