; 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 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. . 6. Definitions In this Act, the following definitions apply: (1) Alcohol-impaired driving The term alcohol-impaired driving means operation of a motor vehicle (as defined in section 30102(a)(6) of title 49, United States Code) by an individual whose blood alcohol content is at or above the legal limit. (2) Legal limit The term legal limit means a blood alcohol concentration of— (A) 0.08 percent or greater (as specified in section 163(a) of title 23, United States Code); or (B) such other percentage limitation as may be established by applicable Federal, State, or local law.