; 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 (b) from apportionment are available for apportionment to a State under paragraph (1), the State does not meet the requirements of subsection (a), the funds shall lapse. (d) Definition of automated traffic enforcement system In this section, the term automated traffic enforcement system has the meaning given such term in section 402(c)(4)(B) of title 23, United States Code. . (b) Conforming amendment The analysis for chapter 1 of title 23, United States Code, is amended by adding at the end the following: 171. Prohibition on the use of automated traffic enforcement systems. .