Final rule (PDF) (12 pp, 132K, published September 29,1998) You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more. Fact Sheet: Final Rule to Allow Former Nonattainment Areas to Opt Into the Federal Reformulated Gasoline Program (PDF)(3 pp, 12 K, September 1998, EPA420-F-98-038)