To amend the Internal Revenue Code of 1986 to clarify the application of the credit for producing fuel from a nonconventional source with respect to gas produced from a tight formation and to make such credit permanent with respect to such gas and gas produced from Devonian Shale.

Amends the Internal Revenue Code to make natural gas found in tight sands formations eligible for the income tax credit for producing fuel from a nonconventional source. Makes this credit permanent with respect to gas found in such formations and to gas produced from Devonian shale.

Applies the nonconventional fuels tax credit to alternative minimum tax calculations.