Source: http://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title26-section30D&num=0&edition=prelim
Timestamp: 2019-04-21 18:33:40+00:00

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There shall be allowed as a credit against the tax imposed by this chapter for the taxable year an amount equal to the sum of the credit amounts determined under subsection (b) with respect to each new qualified plug-in electric drive motor vehicle placed in service by the taxpayer during the taxable year.
The amount determined under this subsection with respect to any new qualified plug-in electric drive motor vehicle is the sum of the amounts determined under paragraphs (2) and (3) with respect to such vehicle.
The amount determined under this paragraph is $2,500.
In the case of a vehicle which draws propulsion energy from a battery with not less than 5 kilowatt hours of capacity, the amount determined under this paragraph is $417, plus $417 for each kilowatt hour of capacity in excess of 5 kilowatt hours. The amount determined under this paragraph shall not exceed $5,000.
For purposes of this title, the credit allowed under subsection (a) for any taxable year (determined after application of paragraph (1)) shall be treated as a credit allowable under subpart A for such taxable year.
(ii) is capable of being recharged from an external source of electricity.
The term "motor vehicle" means any vehicle which is manufactured primarily for use on public streets, roads, and highways (not including a vehicle operated exclusively on a rail or rails) and which has at least 4 wheels.
The term "manufacturer" has the meaning given such term in regulations prescribed by the Administrator of the Environmental Protection Agency for purposes of the administration of title II of the Clean Air Act (42 U.S.C. 7521 et seq.).
The term "capacity" means, with respect to any battery, the quantity of electricity which the battery is capable of storing, expressed in kilowatt hours, as measured from a 100 percent state of charge to a 0 percent state of charge.
In the case of a new qualified plug-in electric drive motor vehicle sold during the phaseout period, only the applicable percentage of the credit otherwise allowable under subsection (a) shall be allowed.
For purposes of this subsection, the phaseout period is the period beginning with the second calendar quarter following the calendar quarter which includes the first date on which the number of new qualified plug-in electric drive motor vehicles manufactured by the manufacturer of the vehicle referred to in paragraph (1) sold for use in the United States after December 31, 2009, is at least 200,000.
(C) 0 percent for each calendar quarter thereafter.
Rules similar to the rules of section 30B(f)(4) shall apply for purposes of this subsection.
For purposes of this subtitle, the basis of any property for which a credit is allowable under subsection (a) shall be reduced by the amount of such credit so allowed (determined without regard to subsection (c)).
The amount of any deduction or other credit allowable under this chapter for a vehicle for which a credit is allowable under subsection (a) shall be reduced by the amount of credit allowed under such subsection for such vehicle (determined without regard to subsection (c)).
In the case of a vehicle the use of which is described in paragraph (3) or (4) of section 50(b) and which is not subject to a lease, the person who sold such vehicle to the person or entity using such vehicle shall be treated as the taxpayer that placed such vehicle in service, but only if such person clearly discloses to such person or entity in a document the amount of any credit allowable under subsection (a) with respect to such vehicle (determined without regard to subsection (c)). For purposes of subsection (c), property to which this paragraph applies shall be treated as of a character subject to an allowance for depreciation.
No credit shall be allowable under subsection (a) with respect to any property referred to in section 50(b)(1).
The Secretary shall, by regulations, provide for recapturing the benefit of any credit allowable under subsection (a) with respect to any property which ceases to be property eligible for such credit.
No credit shall be allowed under subsection (a) for any vehicle if the taxpayer elects to not have this section apply to such vehicle.
(B) the motor vehicle safety provisions of sections 30101 through 30169 of title 49, United States Code.
(B) the amount of the credit allowed under subparagraph (A) shall be treated as a credit allowed under subsection (a).
(ii) in the case of a vehicle that has 2 wheels, after December 31, 2014, and before January 1, 2018.
The Clean Air Act, referred to in subsecs. (d)(1)(D), (3), (f)(7)(A), is act July 14, 1955, ch. 360, 69 Stat. 322 , which is classified generally to chapter 85 (§7401 et seq.) of Title 42, The Public Health and Welfare. Title II of the Act, known as the National Emissions Standards Act, is classified generally to subchapter II (§7521 et seq.) of chapter 85 of Title 42. Section 209(b) of the Act is classified to section 7543(b) of Title 42. For complete classification of this Act to the Code, see Short Title note set out under section 7401 of Title 42 and Tables.
2018-Subsec. (g)(3)(E)(ii). Pub. L. 115–123 substituted "January 1, 2018" for "January 1, 2017".
2015-Subsec. (g)(3)(E). Pub. L. 114–113 substituted "acquired-" for "acquired after December 31, 2011, and before January 1, 2014." and added cls. (i) and (ii).
2014-Subsec. (f)(1), (2). Pub. L. 113–295, §209(e)(1)(A), (B), inserted "(determined without regard to subsection (c))" before period at end.
Subsec. (f)(3). Pub. L. 113–295, §209(e)(2), inserted at end "For purposes of subsection (c), property to which this paragraph applies shall be treated as of a character subject to an allowance for depreciation."
2013-Subsec. (c)(2). Pub. L. 112–240, §104(c)(2)(I), amended par. (2) generally. Prior to amendment, par. (2) related to personal credit with a limitation based on amount of tax.
Subsec. (f)(2). Pub. L. 112–240, §403(b)(1), substituted "vehicle for which a credit is allowable under subsection (a)" for "new qualified plug-in electric drive motor vehicle" and "allowed under such subsection" for "allowed under subsection (a)".
Subsec. (f)(7). Pub. L. 112–240, §403(b)(2), substituted "A vehicle" for "A motor vehicle" in introductory provisions.
Subsec. (g). Pub. L. 112–240, §403(a), added subsec. (g).
2010-Subsec. (c)(2)(B)(ii). Pub. L. 111–148, §10909(b)(2)(H), (c), as amended by Pub. L. 111–312, temporarily substituted "section 25D" for "sections 23 and 25D". See Effective and Termination Dates of 2010 Amendment note below.
2009-Pub. L. 111–5 amended section generally. Prior to amendment, section provided credit with respect to each new qualified plug-in electric drive motor vehicle placed in service and set forth provisions defining "applicable amount" and "new qualified plug-in electric drive motor vehicle" and stating limitations based on vehicle weight, the number of vehicles eligible for credit, and amount of tax liability.
Pub. L. 115–123, div. D, title I, §40405(b), Feb. 9, 2018, 132 Stat. 148 , provided that: "The amendment made by this section [amending this section] shall apply to vehicles acquired after December 31, 2016."
Pub. L. 114–113, div. Q, title I, §183(b), Dec. 18, 2015, 129 Stat. 3073 , provided that: "The amendments made by this section [amending this section] shall apply to vehicles acquired after December 31, 2014."
Amendment by section 104(c)(2)(I) of Pub. L. 112–240 applicable to taxable years beginning after Dec. 31, 2011, see section 104(d) of Pub. L. 112–240, set out as a note under section 23 of this title.
Pub. L. 112–240, title IV, §403(c), Jan. 2, 2013, 126 Stat. 2338 , provided that: "The amendments made by this section [amending this section] shall apply to vehicles acquired after December 31, 2011."
Amendment by Pub. L. 111–5 applicable to vehicles acquired after Dec. 31, 2009, see section 1141(c) of Pub. L. 111–5, set out as a note under section 30B of this title.
Section applicable to taxable years beginning after Dec. 31, 2008, see section 205(e) of Pub. L. 110–343, set out as an Effective and Termination Dates of 2008 Amendment note under section 24 of this title.

References: §209
 §209
 §104
 §403
 §403
 §403
 §10909
 §40405
 §183
 §403