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The highway and diesel fuel regulations include no dye requirements or restrictions for Alaskan fuel, provided the requirements of 40 C.F.R. §§ 69.51 and 69.52 are met. IRS has its own fuel tax requirements.
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)