[Code of Federal Regulations] [Title 40, Volume 29] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR600.101-08] [Page 885] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 600_FUEL ECONOMY OF MOTOR VEHICLES--Table of Contents Subpart B_Fuel Economy Regulations for 1978 and Later Model Year Automobiles_Test Procedures Sec. 600.101-08 General applicability. Source: 42 FR 45657, Sept. 12, 1977, unless otherwise noted. (a) The provisions of this subpart are applicable to 2008 and later model year automobiles, except medium duty passenger vehicles, manufactured on or after January 26, 2007, and to 2011 and later model year medium-duty passenger vehicles. All 2008 automobiles manufactured prior to January 26, 2007 may optionally comply with the provisions of this subpart. [71 FR 77933, Dec. 27, 2006]