---
kind: "section"
citation: "42 U.S.C. § 13257"
title: "42"
title_heading: "The Public Health and Welfare"
number: "13257"
heading: "Fleet requirement program"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/42/13257"
units:
  - "Chapter 134 — Energy Policy"
  - "Subchapter III — Availability and Use of Replacement Fuels, Alternative Fuels, and Alternative Fueled Private Vehicles"
---

# §13257. Fleet requirement program

- (a) **Fleet program purchase goals—**
  - (1) Except as provided in [paragraph (2)](#a-2), the following percentages of new [light duty motor vehicles](/usc/42/13211.md?p=11) acquired in each model year for a [fleet](/usc/42/13211.md?p=9), other than a Federal [fleet](/usc/42/13211.md?p=9), [State](/usc/42/2021b.md?p=14) [fleet](/usc/42/13211.md?p=9), or [fleet](/usc/42/13211.md?p=9) owned, operated, leased, or otherwise controlled by a [covered person](/usc/42/13211.md?p=5) subject to [section 13251 of this title](/usc/42/13251.md), shall be [alternative fueled vehicles](/usc/42/13211.md?p=3-A):
    - (A) 20 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model years 1999, 2000, and 2001;
    - (B) 30 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 2002;
    - (C) 40 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 2003;
    - (D) 50 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 2004;
    - (E) 60 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 2005; and
    - (F) 70 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 2006 and thereafter.
  - (2) The [Secretary](/usc/42/242q–4.md?p=2) may not establish percentage requirements higher than those described in [paragraph (1)](#a-1). The [Secretary](/usc/42/242q–4.md?p=2) may, if appropriate, and pursuant to a rule under [subsection (b)](#b), establish a lesser percentage requirement for any model year. The [Secretary](/usc/42/242q–4.md?p=2) may, by rule, establish a date later than 1998 (or model year 1999) for initiating the [fleet](/usc/42/13211.md?p=9) requirements under [paragraph (1)](#a-1).
  - (3) The [Secretary](/usc/42/242q–4.md?p=2) shall publish an advance notice of proposed rulemaking for the purpose of—
    - (A) evaluating the progress toward achieving the goals of [replacement fuel](/usc/42/13211.md?p=14) use described in [section 13252(b)(2) of this title](/usc/42/13252.md?p=b-2), as modified under [section 13254 of this title](/usc/42/13254.md);
    - (B) identifying the problems associated with achieving those goals;
    - (C) assessing the adequacy and practicability of those goals; and
    - (D) considering all actions needed to achieve those goals.

    The [Secretary](/usc/42/242q–4.md?p=2) shall provide for at least 3 regional hearings on the advance notice of proposed rulemaking, with respect to which official transcripts shall be maintained. The comment period in connection with such advance notice of proposed rulemaking shall be completed within 7 months after publication of the advance notice.

  - (4) After the completion of such advance notice of proposed rulemaking, the [Secretary](/usc/42/242q–4.md?p=2) shall publish in the Federal Register a proposed rule for the rule required under [subsection (b)](#b), and shall provide for a public comment period, with hearings, of not less than 90 days.
- (b) **Early rulemaking—**
  - (1) Not earlier than 1 year after October 24, 1992, and after carrying out the requirements of [subsection (a)](#a), the [Secretary](/usc/42/242q–4.md?p=2) shall initiate a rulemaking to determine whether a [fleet](/usc/42/13211.md?p=9) requirement program to begin in calendar year 1998 (when model year 1999 begins), or such other later date as he may select pursuant to [subsection (a)](#a), is necessary under this section. Such rule, consistent with [subsection (a)(1)](#a-1), shall establish the annual applicable model year percentage. No rule under this subsection may be promulgated after December 15, 1996, and be enforceable. A [fleet](/usc/42/13211.md?p=9) requirement program shall be considered necessary and a rule therefor shall be promulgated if the [Secretary](/usc/42/242q–4.md?p=2) finds that—
    - (A) the goal of [replacement fuel](/usc/42/13211.md?p=14) use described in [section 13252(b)(2)(B) of this title](/usc/42/13252.md?p=b-2-B), as modified under [section 13254 of this title](/usc/42/13254.md), is not expected to be actually achieved by 2010, or such other date as is established under [section 13254 of this title](/usc/42/13254.md), by voluntary means or pursuant to this subchapter or any other law without such a [fleet](/usc/42/13211.md?p=9) requirement program, taking into consideration the status of the achievement of the interim goal described in [section 13252(b)(2)(A) of this title](/usc/42/13252.md?p=b-2-A), as modified under [section 13254 of this title](/usc/42/13254.md);
    - (B) such goal is practicable and actually achievable within periods specified in [section 13252(b)(2) of this title](/usc/42/13252.md?p=b-2), as modified under [section 13254 of this title](/usc/42/13254.md), through implementation of such a [fleet](/usc/42/13211.md?p=9) requirement program in combination with voluntary means and the application of other programs relevant to achieving such goals; and
    - (C) by 1998 (when model year 1999 begins) or the date specified by the [Secretary](/usc/42/242q–4.md?p=2) in such rule for initiating a [fleet](/usc/42/13211.md?p=9) requirement program—
      - (i) there exists sufficient evidence to ensure that the fuel and the needed infrastructure, including the supply and deliverability systems, will be installed and located at convenient places in the [fleet](/usc/42/13211.md?p=9) areas subject to the rule and will be fully operational when the rule is effective to offer a reliable and timely supply of the applicable [alternative fuel](/usc/42/13211.md?p=2) at reasonable costs (as compared to conventional fuels) to meet the [fleet](/usc/42/13211.md?p=9) requirement program, as demonstrated through use of the provisions of [section 13255(1) of this title](/usc/42/13255.md?p=1) regarding voluntary commitments or other adequate, reliable, and convincing forms of agreements, arrangements, or representations that such fuels and infrastructure are in existence or will exist when the rule is effective and will be expanded as the percentages increase annually;
      - (ii) there will be a sufficient number of new [alternative fueled vehicles](/usc/42/13211.md?p=3-A) from original equipment manufacturers that comply with all applicable requirements of the Clean Air Act [[42 U.S.C. 7401](/usc/42/7401.md) et seq.] and [chapter 301](/usc/49/chstVI/ptA/ch301.md) of title 49;
      - (iii) such new vehicles will meet the applicable non-Federal and non-[State](/usc/42/2021b.md?p=14) [fleet](/usc/42/13211.md?p=9) performance requirements of such [fleets](/usc/42/13211.md?p=9) (including range, passenger or cargo-carrying capacity, reliability, refueling capability, vehicle mix, and economical operation and maintenance); and
      - (iv) establishment of a [fleet](/usc/42/13211.md?p=9) requirement program by rule under this subsection will not result in unfair competitive advantages or disadvantages, or result in undue economic hardship, to the affected [fleets](/usc/42/13211.md?p=9).
  - (2) The [Secretary](/usc/42/242q–4.md?p=2) shall not promulgate a rule under this subsection if he is unable to make affirmative findings in the case of each of the subparagraphs under [paragraph (1)](#b-1), and each of the clauses under [subparagraph (C)](#b-1-C) of paragraph (1).
  - (3) If the [Secretary](/usc/42/242q–4.md?p=2) does not determine that such program is necessary under this subsection, the provisions of [subsection (e)](#e) shall apply to the consideration in the future of any [fleet](/usc/42/13211.md?p=9) requirement program. The record of this rulemaking, including the [Secretary](/usc/42/242q–4.md?p=2)’s findings, shall be incorporated into a rulemaking under that subsection. If the [Secretary](/usc/42/242q–4.md?p=2) determines under this subsection that such program is necessary, the [Secretary](/usc/42/242q–4.md?p=2) shall not initiate the later rulemaking under [subsection (e)](#e).
- (c) **Advance notice of proposed rulemaking—** Not later than April 1, 1998, the [Secretary](/usc/42/242q–4.md?p=2) shall publish an advance notice of proposed rulemaking for the purpose of—
  - (1) evaluating the progress toward achieving the goals of [replacement fuel](/usc/42/13211.md?p=14) use described in [section 13252(b)(2) of this title](/usc/42/13252.md?p=b-2), as modified under [section 13254 of this title](/usc/42/13254.md);
  - (2) identifying the problems associated with achieving those goals;
  - (3) assessing the adequacy and practicability of those goals; and
  - (4) considering all actions needed to achieve those goals.

  The [Secretary](/usc/42/242q–4.md?p=2) shall provide for at least 3 regional hearings on the advance notice of proposed rulemaking, with respect to which official transcripts shall be maintained. The comment period in connection with such advance notice of proposed rulemaking shall be completed within 7 months after publication of the advance notice.

- (d) **Proposed rule—** Before May 1, 1999, the [Secretary](/usc/42/242q–4.md?p=2) shall publish in the Federal Register a proposed rule for the rule required under [subsection (g)](#g), and shall provide for a public comment period, with hearings, of not less than 90 days.
- (e) **Determination—**
  - (1) Not later than January 1, 2000, the [Secretary](/usc/42/242q–4.md?p=2) shall, through the rule required under [subsection (g)](#g), determine whether a [fleet](/usc/42/13211.md?p=9) requirement program is necessary under this section. Such a program shall be considered necessary and a rule therefor shall be promulgated if the [Secretary](/usc/42/242q–4.md?p=2) finds that—
    - (A) the goal of [replacement fuel](/usc/42/13211.md?p=14) use described in [section 13252(b)(2)(B) of this title](/usc/42/13252.md?p=b-2-B), as modified under [section 13254 of this title](/usc/42/13254.md), is not expected to be actually achieved by 2010, or such other date as is established under [section 13254 of this title](/usc/42/13254.md), by voluntary means or pursuant to this subchapter or any other law without such a [fleet](/usc/42/13211.md?p=9) requirement program, taking into consideration the status of the achievement of the interim goal described in [section 13252(b)(2)(A) of this title](/usc/42/13252.md?p=b-2-A), as modified under [section 13254 of this title](/usc/42/13254.md); and
    - (B) such goal is practicable and actually achievable within periods specified in [section 13252(b)(2) of this title](/usc/42/13252.md?p=b-2), as modified under [section 13254 of this title](/usc/42/13254.md), through implementation of such a [fleet](/usc/42/13211.md?p=9) requirement program in combination with voluntary means and the application of other programs relevant to achieving such goals.
  - (2) The rule under subsection [(b)](#b) or [(g)](#g) shall also modify the goal described in [section 13252(b)(2)(B) of this title](/usc/42/13252.md?p=b-2-B) and establish a revised goal pursuant to [section 13254 of this title](/usc/42/13254.md) if the [Secretary](/usc/42/242q–4.md?p=2) determines, based on the proceeding required under subsection [(a)](#a) or [(c)](#c), that the goal in effect at the time of that proceeding is inadequate or impracticable, and not expected to be achievable. Such goal as modified and established shall be applicable in making the findings described in [paragraph (1)](#e-1). If the [Secretary](/usc/42/242q–4.md?p=2) modifies the goal under this paragraph, he may also modify the percentages stated in subsection [(a)(1)](#a-1) or [(g)(1)](#g-1) and the minimum percentage stated in subsection [(a)(2)](#a-2) or [(g)(2)](#g-2) shall be not less than 10 percent.
- (f) **Explanation of determination that fleet requirement program is not necessary—** If the [Secretary](/usc/42/242q–4.md?p=2) determines, based on findings under subsection [(b)](#b) or [(e)](#e), that a [fleet](/usc/42/13211.md?p=9) requirement program under this section is not necessary, the [Secretary](/usc/42/242q–4.md?p=2) shall—
  - (1) by December 15, 1996, with respect to a rulemaking under [subsection (b)](#b); and
  - (2) by January 1, 2000, with respect to a rulemaking under [subsection (e)](#e),

  publish such determination in the Federal Register as a final [agency](/usc/42/8262.md?p=1) action, including an explanation of the findings on which such determination is made and the basis for the determination.

- (g) **Fleet requirement program—**
  - (1) If the [Secretary](/usc/42/242q–4.md?p=2) determines under [subsection (e)](#e) that a [fleet](/usc/42/13211.md?p=9) requirement program is necessary, the [Secretary](/usc/42/242q–4.md?p=2) shall, by January 1, 2000, by rule require that, except as provided in [paragraph (2)](#g-2), of the total number of new [light duty motor vehicles](/usc/42/13211.md?p=11) acquired for a [fleet](/usc/42/13211.md?p=9), other than a Federal [fleet](/usc/42/13211.md?p=9), [State](/usc/42/2021b.md?p=14) [fleet](/usc/42/13211.md?p=9), or [fleet](/usc/42/13211.md?p=9) owned, operated, leased, or otherwise controlled by a [covered person](/usc/42/13211.md?p=5) under [section 13251 of this title](/usc/42/13251.md)—
    - (A) 20 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 2002;
    - (B) 40 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 2003;
    - (C) 60 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 2004; and
    - (D) 70 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 2005 and thereafter,

    shall be [alternative fueled vehicles](/usc/42/13211.md?p=3-A).

  - (2) The [Secretary](/usc/42/242q–4.md?p=2) may not establish percentage requirements higher than those described in [paragraph (1)](#g-1). The [Secretary](/usc/42/242q–4.md?p=2) may, if appropriate, and pursuant to a rule under [subsection (g)](#g), establish a lesser percentage requirement for any model year. The [Secretary](/usc/42/242q–4.md?p=2) may, by rule, establish a date later than 2002 (when model year 2003 begins) for initiating the [fleet](/usc/42/13211.md?p=9) requirements under [paragraph (1)](#g-1).
  - (3) Nothing in this subchapter shall be construed as requiring any [fleet](/usc/42/13211.md?p=9) to acquire [alternative fueled vehicles](/usc/42/13211.md?p=3-A) or [alternative fuels](/usc/42/13211.md?p=2) that do not meet the normal business requirements and [practices](/usc/42/17061.md?p=19) and needs of that [fleet](/usc/42/13211.md?p=9).
  - (4) A vehicle operating only on gasoline that complies with applicable requirements of the Clean Air Act [[42 U.S.C. 7401](/usc/42/7401.md) et seq.] shall not be considered an [alternative fueled vehicle](/usc/42/13211.md?p=3-A) under [subsection (b)](#b) or this subsection, except that the [Secretary](/usc/42/242q–4.md?p=2), as part of the rule under [subsection (b)](#b) or this subsection, may determine that such vehicle should be treated as an [alternative fueled vehicle](/usc/42/13211.md?p=3-A) for purposes of this section, for [fleets](/usc/42/13211.md?p=9) subject to part C of title II of the Clean Air Act [[42 U.S.C. 7581](/usc/42/7581.md) et seq.], taking into consideration the impact on energy security and the goals stated in [section 13252(a) of this title](/usc/42/13252.md?p=a).
- (h) **Extension of deadlines—** The [Secretary](/usc/42/242q–4.md?p=2) may, by notice published in the Federal Register, extend the deadlines established under subsections [(e)](#e), [(f)(2)](#f-2), and [(g)](#g) for an additional 90 days if the [Secretary](/usc/42/242q–4.md?p=2) is unable to meet such deadlines. Such extension shall not be reviewable.
- (i) **Exemptions—**
  - (1) A rule issued under subsection [(b)](#b), [(g)](#g), or [(o)](#o) shall provide for the prompt exemption by the [Secretary](/usc/42/242q–4.md?p=2), through a simple and reasonable process, of any [fleet](/usc/42/13211.md?p=9) from the requirements of subsection [(b)](#b), [(g)](#g), or [(o)](#o), in whole or in part, if it is demonstrated to the satisfaction of the [Secretary](/usc/42/242q–4.md?p=2) that—
    - (A) [alternative fueled vehicles](/usc/42/13211.md?p=3-A) that meet the normal requirements and [practices](/usc/42/17061.md?p=19) of the principal business of the [fleet](/usc/42/13211.md?p=9) [owner](/usc/42/13641.md?p=4) are not reasonably available for acquisition;
    - (B) [alternative fuels](/usc/42/13211.md?p=2) that meet the normal requirements and [practices](/usc/42/17061.md?p=19) of the principal business of the [fleet](/usc/42/13211.md?p=9) [owner](/usc/42/13641.md?p=4) are not available in the area in which the vehicles are to be operated; or
    - (C) in the case of [State](/usc/42/2021b.md?p=14) and local government entities, the application of such requirements would pose an unreasonable financial hardship.
  - (2) In the case of private [fleets](/usc/42/13211.md?p=9), if the [motor vehicles](/usc/42/13211.md?p=13), when under normal operations, are garaged at personal residences at night, such [motor vehicles](/usc/42/13211.md?p=13) shall be exempt from the requirements of subsections [(b)](#b) and [(g)](#g).
- (j) **Conversions—** Nothing in this subchapter or the amendments made by this subchapter shall require a [fleet](/usc/42/13211.md?p=9) [owner](/usc/42/13641.md?p=4) to acquire conversion vehicles.
- (k) **Inclusion of law enforcement vehicles and urban buses—**
  - (1) If the [Secretary](/usc/42/242q–4.md?p=2) determines, by rule, that the inclusion of [fleets](/usc/42/13211.md?p=9) of law enforcement [motor vehicles](/usc/42/13211.md?p=13) in the [fleet](/usc/42/13211.md?p=9) requirement program established under [subsection (g)](#g) would contribute to achieving the goal described in [section 13252(b)(2)(B) of this title](/usc/42/13252.md?p=b-2-B), as modified under [section 13254 of this title](/usc/42/13254.md), and the [Secretary](/usc/42/242q–4.md?p=2) finds that such inclusion would not hinder the use of the [motor vehicles](/usc/42/13211.md?p=13) for law enforcement purposes, the [Secretary](/usc/42/242q–4.md?p=2) may include such [fleets](/usc/42/13211.md?p=9) in such program. The [Secretary](/usc/42/242q–4.md?p=2) may only initiate one rulemaking under this paragraph.
  - (2) If the [Secretary](/usc/42/242q–4.md?p=2) determines, by rule, that the inclusion of new urban buses, as defined by the [Administrator](/usc/42/13211.md?p=1) under title II of the Clean Air Act [[42 U.S.C. 7521](/usc/42/7521.md) et seq.], in a [fleet](/usc/42/13211.md?p=9) requirement program established under [subsection (g)](#g) would contribute to achieving the goal described in [section 13252(b)(2)(B) of this title](/usc/42/13252.md?p=b-2-B), as modified under [section 13254 of this title](/usc/42/13254.md), the [Secretary](/usc/42/242q–4.md?p=2) may include such urban buses in such program, if the [Secretary](/usc/42/242q–4.md?p=2) finds that such application will be consistent with energy security goals and the needs and objectives of encouraging and facilitating the greater use of such urban buses by the public, taking into consideration the impact of such application on public transit entities. The [Secretary](/usc/42/242q–4.md?p=2) may only initiate one rulemaking under this paragraph.
  - (3) Rulemakings under paragraph [(1)](#k-1) or [(2)](#k-2) shall be separate from a rulemaking under [subsection (g)](#g), but may not occur unless a rulemaking is carried out under [subsection (g)](#g).
- (l) **Consideration of factors—** In carrying out this section, the [Secretary](/usc/42/242q–4.md?p=2) shall take into consideration energy security, costs, safety, lead time requirements, vehicle miles traveled annually, effect on greenhouse gases, technological feasibility, energy requirements, economic impacts, including impacts on workers and the impact on consumers (including users of the [alternative fuel](/usc/42/13211.md?p=2) for purposes such as for residences, agriculture, process use, and non-fuel purposes) and [fleets](/usc/42/13211.md?p=9), the availability of [alternative fuels](/usc/42/13211.md?p=2) and [alternative fueled vehicles](/usc/42/13211.md?p=3-A), and other relevant factors.
- (m) **Consultation and participation of other Federal agencies—** In carrying out this section and [section 13256 of this title](/usc/42/13256.md), the [Secretary](/usc/42/242q–4.md?p=2) shall consult with the [Secretary](/usc/42/242q–4.md?p=2) of Transportation, the [Administrator](/usc/42/13211.md?p=1), and other appropriate Federal [agencies](/usc/42/8262.md?p=1). The [Secretary](/usc/42/242q–4.md?p=2) shall provide for the participation of the [Secretary](/usc/42/242q–4.md?p=2) of Transportation and the [Administrator](/usc/42/13211.md?p=1) in the development and issuance of the rule under this section, including the public process concerning such rule.
- (n) **Petitions—** As part of the rule promulgated either pursuant to subsection [(b)](#b) or [(g)](#g) of this section, the [Secretary](/usc/42/242q–4.md?p=2) shall establish procedures for any [fleet](/usc/42/13211.md?p=9) [owner](/usc/42/13641.md?p=4) or operator or [motor vehicle](/usc/42/13211.md?p=13) manufacturer to request that the [Secretary](/usc/42/242q–4.md?p=2) modify or suspend a [fleet](/usc/42/13211.md?p=9) requirement program established under either subsection nationally, by region, or in an applicable [fleet](/usc/42/13211.md?p=9) area because, as demonstrated by the petitioner, the infrastructure or fuel supply or distribution system for an applicable [alternative fuel](/usc/42/13211.md?p=2) is inadequate to meet the needs of a [fleet](/usc/42/13211.md?p=9). In the event that the [Secretary](/usc/42/242q–4.md?p=2) determines that a modification or suspension of the [fleet](/usc/42/13211.md?p=9) requirement program on a regional basis would detract from the nationwide character of any [fleet](/usc/42/13211.md?p=9) requirement program established by rule or would sufficiently diminish the economies of scale for the production of [alternative fueled vehicles](/usc/42/13211.md?p=3-A) or [alternative fuels](/usc/42/13211.md?p=2) and thereafter the practicability and effectiveness of such program, the [Secretary](/usc/42/242q–4.md?p=2) may only modify or suspend the program nationally. The procedures shall include provisions for notice and public hearings. The [Secretary](/usc/42/242q–4.md?p=2) shall deny or grant the petition within 180 days after filing.
- (o) **Mandatory State fleet programs—**
  - (1) Pursuant to a rule promulgated by the [Secretary](/usc/42/242q–4.md?p=2), beginning in calendar year 1995 (when model year 1996 begins), the following percentages of new [light duty motor vehicles](/usc/42/13211.md?p=11) acquired annually for [State](/usc/42/2021b.md?p=14) government [fleets](/usc/42/13211.md?p=9), including [agencies](/usc/42/8262.md?p=1) thereof, but not municipal [fleets](/usc/42/13211.md?p=9), shall be [alternative fueled vehicles](/usc/42/13211.md?p=3-A):
    - (A) 10 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 1996;
    - (B) 15 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 1997;
    - (C) 25 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 1998;
    - (D) 50 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 1999;
    - (E) 75 percent of the [motor vehicles](/usc/42/13211.md?p=13) acquired in model year 2000 and thereafter.
  - (2)
    - (A) The [Secretary](/usc/42/242q–4.md?p=2) shall within 18 months after October 24, 1992, promulgate a rule providing that a [State](/usc/42/2021b.md?p=14) may submit a plan within 12 months after such promulgation containing a light duty [alternative fueled vehicle](/usc/42/13211.md?p=3-A) plan for [State](/usc/42/2021b.md?p=14) [fleets](/usc/42/13211.md?p=9) to meet the annual percentages established under [paragraph (1)](#o-1) for the acquisition of [light duty motor vehicles](/usc/42/13211.md?p=11). The plan shall provide for the voluntary conversion or acquisition or combination thereof, beyond any acquisition required by this subchapter, of such [motor vehicles](/usc/42/13211.md?p=13) by [State](/usc/42/2021b.md?p=14), local, or private [fleets](/usc/42/13211.md?p=9), in numbers greater than or equal to the number of [State](/usc/42/2021b.md?p=14) [alternative fueled vehicles](/usc/42/13211.md?p=3-A) required pursuant to [paragraph (1)](#o-1).
    - (B) The plan, if approved by the [Secretary](/usc/42/242q–4.md?p=2), would be in lieu of the [State](/usc/42/2021b.md?p=14) meeting such annual percentages solely through purchases of new [State](/usc/42/2021b.md?p=14)-owned vehicles. All conversions or acquisitions or combinations thereof of any [alternative fueled vehicles](/usc/42/13211.md?p=3-A) under the plan must be voluntary and must conform with the requirements of section 247 of the Clean Air Act [[42 U.S.C. 7587](/usc/42/7587.md)] and must comply with applicable safety requirements. The [Secretary](/usc/42/242q–4.md?p=2) of Transportation shall within 3 years after enactment promulgate rules setting forth safety standards in accordance with [chapter 301](/usc/49/chstVI/ptA/ch301.md) of title 49 applicable to all conversions.

## Source credit

(Pub. L. 102–486, title V, § 507, Oct. 24, 1992, 106 Stat. 2891.)

## Notes

### Editorial Notes

### References in Text

The Clean Air Act, referred to in subsecs. (b)(1)(C)(ii), (g)(4), and (k)(2), is act July 14, 1955, ch. 360, 69 Stat. 322, which is classified generally to chapter 85 (§ 7401 et seq.) of this title. Title II of the Act, known as the National Emission Standards Act, is classified generally to subchapter II (§ 7521 et seq.) of chapter 85 of this title. Part C of title II of the Act is classified generally to part C (§ 7581 et seq.) of chapter 85 of this title. For complete classification of this Act to the Code, see Short Title note set out under section 7401 of this title and Tables.

This subchapter, referred to in subsecs. (b)(1)(A), (e)(1)(A), (g)(3), (j), and (o)(2)(A), was in the original “this title” meaning title V of Pub. L. 102–486, Oct. 24, 1992, 102 Stat. 2887, which is classified generally to this subchapter.

### Codification

In subsecs. (b)(1)(C)(ii) and (o)(2)(B), “chapter 301 of title 49” substituted for “the National Traffic and Motor Vehicle Safety Act of 1966 [15 U.S.C. 1381 et seq.]” on authority of Pub. L. 103–272, § 6(b), July 5, 1994, 108 Stat. 1378, the first section of which enacted subtitles II, III, and V to X of Title 49, Transportation.