The nonroad rule final regulations (69 FR 38958, June 29, 2004) identify all the provisions that were amended from the highway diesel rule. Provisions that were changed are specifically noted at the beginning of the applicable section. However, please feel free to contact EPA staff if you have questions on a specific section.

Question and Answer was originally posted at Questions and Answers on the Clean Diesel Fuel Rules (PDF)(135 pp, 888 K, EPA420-B-06-010, July 2006, About PDF)