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Title 49—TRANSPORTATION > SUBTITLE VI—MOTOR VEHICLE AND DRIVER PROGRAMS > PART A—GENERAL > CHAPTER 301—MOTOR VEHICLE SAFETY > SUBCHAPTER I—GENERAL

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The Secretary of Transportation may not prescribe a safety regulation related to a motor vehicle subject to subchapter I of chapter 135 of this title that differs from a motor vehicle safety standard prescribed under this chapter. However, the Secretary may prescribe, for a motor vehicle operated by a carrier subject to subchapter I of chapter 135, a safety regulation that imposes a higher standard of performance after manufacture than that required by an applicable standard in effect at the time of manufacture.

( Pub. L. 103–272, § 1(e) , July 5, 1994 , 108 Stat. 943 ; Pub. L. 104–88, title III, § 308(j) , Dec. 29, 1995 , 109 Stat. 947 .)

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