[Code of Federal Regulations] [Title 49, Volume 1] [Revised as of October 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR71.6] [Page 704] TITLE 49--TRANSPORTATION Subtitle A--Office of the Secretary of Transportation PART 71_STANDARD TIME ZONE BOUNDARIES--Table of Contents Sec. 71.6 Central zone. The third zone, the central standard time zone, includes that part of the United States that is west of the boundary line between the eastern and central standard time zones described in Sec. 71.5 and east of the boundary line between the central and mountain standard time zones described in Sec. 71.7.