Sec. 2 Clarification of tar sands as crude oil for excise tax purposes (a) In general— Paragraph (1) of section 4612(a) of the Internal Revenue Code of 1986 is amended by striking “and natural gasoline” and inserting “, natural gasoline, and tar sands”. ⋯ (b) Effective date— The amendments made by this section shall take effect on the date of the enactment of this Act. ⋯