# Amendments Related to Marine Diesel Engine Emission Standards
> **Rule** · Final rule. · Published 2020-10-02 · Effective 2020-11-02 · 85 FR 62218
## Document
- **Document number:** 2020-18621
- **Category:** air-emissions
- **Federal Register citation:** 85 FR 62218
- **CFR reference:** 40 CFR 1042
- **Publication date:** 2020-10-02
- **Effective date:** 2020-11-02
- **EPA docket:** EPA-HQ-OAR-2018-0638
## Abstract

The Environmental Protection Agency (EPA) is amending the national marine diesel engine program with relief provisions to address concerns associated with finding and installing certified Tier 4 marine diesel engines in certain high-speed commercial vessels. This relief is in the form of additional lead time for qualifying engines and vessels.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/10/02/2020-18621/amendments-related-to-marine-diesel-engine-emission-standards)
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