49 C.F.R. § 71.4 Eastern zone.
Title 49 - Transportation
The second zone, the eastern standard time zone, includes that part of the United States that is west of 67°30" W. longitude and east of the boundary line described in §71.5, and includes all of the State of Maine, but does not include any part of the Commonwealth of Puerto Rico.
Title 49: Transportation
PART 71—STANDARD TIME ZONE BOUNDARIES
§ 71.4 Eastern zone.
