[Code of Federal Regulations] [Title 49, Volume 6] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR531.3] [Page 96] TITLE 49--TRANSPORTATION CHAPTER V--NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 531_PASSENGER AUTOMOBILE AVERAGE FUEL ECONOMY STANDARDS--Table of Contents Sec. 531.3 Applicability. This part applies to manufacturers of passenger automobiles.