42 U.S.C. ยง 7521
United States Code, 2018 Edition
Title 42 - THE PUBLIC HEALTH AND WELFARE
CHAPTER 85 - AIR POLLUTION PREVENTION AND CONTROL
SUBCHAPTER II - EMISSION STANDARDS FOR MOVING SOURCES
Part A - Motor Vehicle Emission and Fuel Standards
Sec. 7521 - Emission standards for new motor vehicles or new motor vehicle engines
From the U.S. Government Publishing Office,