RAILROAD TRACK MAINTENANCE.

SEC. 316. RAILROAD TRACK MAINTENANCE.(a) In General.—Subsection (f) of section 45G (relating to application of section) is amended by striking “January 1, 2008” and inserting “January 1, 2010”.(b) Credit Allowed Against Alternative Minimum Tax.—Subparagraph (B) of section 38(c)(4), as amended by this Act, is amended—(1) by redesignating clauses (v), (vi), and (vii) as clauses (vi), (vii), and (viii), respectively, and(2) by inserting after clause (iv) the following new clause:“(v) the credit determined under section 45G,”.(c) Effective Dates.—122 STAT. 3873(1) The amendment made by subsection (a) shall apply to expenditures paid or incurred during taxable years beginning after December 31, 2007.(2) The amendments made by subsection (b) shall apply to credits determined under section 45G of the Internal Revenue Code of 1986 in taxable years beginning after December 31, 2007, and to carrybacks of such credits.