‘‘(A) requires a driver to provide a breath 
sample prior to the motor vehicle starting; and 
‘‘(B) prevents a motor vehicle from start-
ing if the alcohol concentration of the driver is 
above the legal limit. 
‘‘(4) MOTOR VEHICLE.— 
‘‘(A) IN GENERAL.—The term ‘motor vehi-
cle’ means a vehicle driven or drawn by me-
chanical power and manufactured primarily for 
use on public highways. 
‘‘(B) EXCLUSIONS.—The term ‘motor vehi-
cle’ does not include— 
‘‘(i) a vehicle operated solely on a rail 
line; or 
‘‘(ii) a commercial vehicle. 
‘‘(b) LAWS REQUIRING IGNITION INTERLOCK DE-
VICES.—A State meets the requirements of this subsection 
if the State has enacted and is enforcing a law that re-
quires throughout the State the installation of an ignition 
interlock device for a minimum of 180 days on each motor 
vehicle operated by an individual who is convicted of driv-
ing while intoxicated or driving under the influence. 
‘‘(c) WITHHOLDING
OF FUNDS
FOR NONCOMPLI-
ANCE.— 
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‘‘(1) FISCAL YEAR 2022.—On October 1, 2021, 
the Secretary shall withhold 1 percent of the amount 
required to be apportioned to a State under each of 
paragraphs (1) and (2) of section 104(b) if the State 
does not meet the requirements of subsection (b). 
‘‘(2) FISCAL YEAR 2023.—On October 1, 2022, 
the Secretary shall withhold 3 percent of the amount 
required to be apportioned to a State under each of 
paragraphs (1) and (2) of section 104(b) if the State 
does not meet the requirements of subsection (b). 
‘‘(3) FISCAL YEAR 2024 AND THEREAFTER.—On 
October 1, 2023, and on October 1 of each fiscal 
year thereafter, the Secretary shall withhold 5 per-
cent of the amount required to be apportioned to a 
State under each of paragraphs (1) and (2) of sec-
tion 104(b) if the State does not meet the require-
ments of subsection (b). 
‘‘(d) PERIOD
OF
AVAILABILITY
OF
WITHHELD 
FUNDS; EFFECT
OF COMPLIANCE
AND NONCOMPLI-
ANCE.— 
‘‘(1) PERIOD OF AVAILABILITY OF WITHHELD 
FUNDS.—Any funds withheld under subsection (c) 
from apportionment to a State shall remain available 
for apportionment to the State until the end of the 
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third fiscal year following the fiscal year for which 
the funds are authorized to be appropriated. 
‘‘(2) APPORTIONMENT
OF
WITHHELD
FUNDS 
AFTER COMPLIANCE.—If, before the last day of the 
period for which funds withheld under subsection (c) 
from apportionment are to remain available for ap-
portionment to a State under paragraph (1), the 
State meets the requirements of subsection (b), the 
Secretary shall, on the first day on which the State 
meets the requirements of subsection (b), apportion 
to the State the funds withheld under subsection (c) 
that remain available for apportionment to the 
State. 
‘‘(3) PERIOD
OF
AVAILABILITY
OF
SUBSE-
QUENTLY APPORTIONED FUNDS.—Any funds appor-
tioned pursuant to paragraph (2)— 
‘‘(A) shall remain available for expenditure 
until the end of the third fiscal year following 
the fiscal year in which the funds are so appor-
tioned; and 
‘‘(B) if not apportioned at the end of that 
period, shall lapse. 
‘‘(4) EFFECT OF NONCOMPLIANCE.—If, at the 
end of the period for which funds withheld under 
subsection (c) from apportionment are available for 
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apportionment to a State under paragraph (1), the 
State does not meet the requirements of subsection 
(b), the funds shall lapse.’’. 
(b) CONFORMING AMENDMENT.—The analysis for 
chapter 1 of title 23, United States Code, is amended by 
adding at the end the following: 
‘‘171. Use of ignition interlock devices to prevent repeat intoxicated driving.’’. 
Æ 
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