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‘‘(10) CARRYBACK
AND
CARRYFORWARD
AL-
LOWED.— 
‘‘(A) IN GENERAL.—If the credit allowable 
under subsection (a) for a taxable year exceeds 
the amount of the limitation under subsection (e) 
for such taxable year (in this paragraph referred 
to as the ‘unused credit year’), such excess shall 
be a credit carryback to each of the 3 taxable 
years preceding the unused credit year and a 
credit carryforward to each of the 20 taxable 
years following the unused credit year, except 
that no excess may be carried to a taxable year 
beginning before the date of the enactment of this 
section. The preceding sentence shall not apply to 
any credit carryback if such credit carryback is 
attributable to property for which a deduction 
for depreciation is not allowable. 
‘‘(B) RULES.—Rules similar to the rules of 
section 39 shall apply with respect to the credit 
carryback and credit carryforward under sub-
paragraph (A). 
‘‘(11) INTERACTION
WITH
AIR
QUALITY
AND 
MOTOR VEHICLE SAFETY STANDARDS.—Unless other-
wise provided in this section, a motor vehicle shall
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not be considered eligible for a credit under this sec-
tion unless such vehicle is in compliance with— 
‘‘(A) the applicable provisions of the Clean 
Air Act for the applicable make and model year 
of the vehicle (or applicable air quality provi-
sions of State law in the case of a State which 
has adopted such provision under a waiver 
under section 209(b) of the Clean Air Act), and 
‘‘(B) the motor vehicle safety provisions of 
sections 30101 through 30169 of title 49, United 
States Code. 
‘‘(g) REGULATIONS.— 
‘‘(1) IN GENERAL.—Except as provided in para-
graph (2), the Secretary shall promulgate such regula-
tions as necessary to carry out the provisions of this 
section. 
‘‘(2) COORDINATION IN PRESCRIPTION OF CER-
TAIN REGULATIONS.—The Secretary of the Treasury, 
in coordination with the Secretary of Transportation 
and the Administrator of the Environmental Protec-
tion Agency, shall prescribe such regulations as nec-
essary to determine whether a motor vehicle meets the 
requirements to be eligible for a credit under this sec-
tion.
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‘‘(h) TERMINATION.—This section shall not apply to 
any property purchased after— 
‘‘(1) in the case of a new qualified fuel cell motor 
vehicle (as described in subsection (b)), December 31, 
2014, 
‘‘(2) in the case of a new qualified hybrid motor 
vehicle (as described in subsection (c)), December 31, 
2009, and 
‘‘(3) in the case of a new qualified alternative 
fuel vehicle (as described in subsection (d)), December 
31, 2010.’’. 
(b) CONFORMING AMENDMENTS.— 
(1) Section 1016(a), as amended by this Act, is 
amended by striking ‘‘and’’ at the end of paragraph 
(35), by striking the period at the end of paragraph 
(36) and inserting ‘‘, and’’, and by adding at the end 
the following new paragraph: 
‘‘(37) 
to 
the 
extent 
provided 
in 
section 
30B(f)(4).’’. 
(2) Section 55(c)(2), as amended by this Act, is 
amended by inserting ‘‘30B(e),’’ after ‘‘30(b)(2),’’. 
(3) Section 6501(m) is amended by inserting 
‘‘30B(f)(9),’’ after ‘‘30(d)(4),’’. 
(4) The table of sections for subpart B of part IV 
of subchapter A of chapter 1 is amended by inserting
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after the item relating to section 30A the following 
new item: 
‘‘Sec. 30B. Alternative motor vehicle credit.’’. 
(c) EFFECTIVE DATE.—The amendments made by this 
section shall apply to property placed in service after the 
date of the enactment of this Act, in taxable years ending 
after such date. 
SEC. 1532. MODIFICATION OF CREDIT FOR QUALIFIED 
ELECTRIC VEHICLES. 
(a) AMOUNT OF CREDIT.— 
(1) IN GENERAL.—Section 30(a) (relating to al-
lowance of credit) is amended by striking ‘‘10 percent 
of’’. 
(2) LIMITATION OF CREDIT ACCORDING TO TYPE 
OF VEHICLE.—Paragraph (1) of section 30(b) (relat-
ing to limitations) is amended to read as follows: 
‘‘(1) LIMITATION ACCORDING TO TYPE OF VEHI-
CLE.—The amount of the credit allowed under sub-
section (a) for any vehicle shall not exceed the greatest 
of the following amounts applicable to such vehicle: 
‘‘(A) In the case of a vehicle with a gross 
vehicle weight rating not exceeding 8,500 
pounds— 
‘‘(i) except as provided in clause (ii) or 
(iii), $4,000, 
‘‘(ii) $6,000, if such vehicle is—
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‘‘(I) capable of a driving range of 
at least 100 miles on a single charge of 
the vehicle’s rechargeable batteries as 
measured pursuant to the urban dyna-
mometer schedules under appendix I to 
part 86 of title 40, Code of Federal 
Regulations, or 
‘‘(II) capable of a payload capac-
ity of at least 1,000 pounds, and 
‘‘(iii) if such vehicle is a low-speed ve-
hicle which conforms to Standard 500 pre-
scribed by the Secretary of Transportation 
(49 C.F.R. 571.500), as in effect on the date 
of the enactment of the Energy Tax Incen-
tives Act, the lesser of— 
‘‘(I) 10 percent of the manufactur-
er’s suggested retail price of the vehicle, 
or 
‘‘(II) $1,500. 
‘‘(B) In the case of a vehicle with a gross 
vehicle weight rating exceeding 8,500 but not ex-
ceeding 14,000 pounds, $10,000. 
‘‘(C) In the case of a vehicle with a gross 
vehicle weight rating exceeding 14,000 but not 
exceeding 26,000 pounds, $20,000.