DRAFT. Waiver from Tier 4 Emission Standards for Marine Diesel Engines (Renewal)

EPA is amending its regulations at 40 CFR part 1042 to allow qualified boat builders to install engines that meet EPAs Tier 3 emission standards instead of the Tier 4 emission standards. EPA adopted the Tier 4 standards June 30, 2008 under the authority of the Clean Air Act (73 FR 37096). The relevant standards took effect January 1, 2017 for engines above 1,000 kW, and October 1, 2017 for 600-1,000 kW engines. The final rule specifies that boat builders must submit information describing their need for regulatory relief and demonstrate that they meet the qualifying conditions.

The latest form for DRAFT. Waiver from Tier 4 Emission Standards for Marine Diesel Engines (Renewal) expires 2024-01-31 and can be found here.