The high cost of fuel is a popular topic these days. The debate over oil prices, however, obscures the fact that considerable legislative, regulatory, and legal action has been taken over the last year affecting motor vehicles, including the Energy Tax Incentives Act of 2005, the Safe, Accountable, Flexible, Efficient, Transportation Equity Act: A Legacy for Users (SAFETY), Rev. Proc. 2006-15, 2006-5, IRB 387, Rev. Proc. 2006-18, 2006-12 IRB 845, and Notice 2005-44, 2005-25 IRB 1287.