Final Rule for Clean Alternative Fuel Vehicle and Engine Conversions
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Rule Summary
EPA is streamlining the process by which manufacturers of clean alternative fuel conversion systems may demonstrate compliance with vehicle and engine emissions requirements. Specifically, EPA is revising the regulatory criteria for gaining an exemption from the Clean Air Act prohibition against tampering for the conversion of vehicles and engines to operate on a clean alternative fuel. This final rule creates additional compliance options beyond certification that protect manufacturers of clean alternative fuel conversion systems against a tampering violation, depending on the age of the vehicle or engine to be converted.
- Final Rule (pdf) (821 KB, published April 8, 2011)
- Response to Comments (pdf) (832 KB, EPA-420-R-11-002, March 2011)