The next time anyone complains about oil from “unstable” countries, check the US Congress. With their Clean Energy Act of 2007, House Democrats test new limits for instability.The bill, introduced Jan. 12, would: Deny oil and gas producers and refiners use of the manufacturing tax deduction enacted in the American Jobs Creation Act of 2004. Extend by 2 years the 5-year amortization period for geological and geophysical expenditures by major integrated oil companies. In 2005, Congress refused to allow expensing of G&G costs, formerly amortized over the lives of producing properties, but agreed to shorten the amortization period to 2 years for most producers and 5 years for ...