49 CFR Part 71 — Standard Time Zone Boundaries

PART 71—STANDARD TIME ZONE BOUNDARIES Authority: Secs. 1-4, 40 Stat. 450, as amended; sec. 1, 41 Stat. 1446, as amended; secs. 2-7, 80 Stat. 107, as amended; 100 Stat. 764; Act of Mar. 19, 1918, as amended by the Uniform Time Act of 1966 and Pub. L. 97-449, 15 U.S.C. 260-267; Pub. L. 99-359; Pub. L. 106-564, 15 U.S.C. 263, 114 Stat. 2811; 49 CFR 1.59(a), unless otherwise noted. Source: Amdt. 71-11, 35 FR 12318, Aug. 1, 1970, unless otherwise noted. § 71.1 Limits defined; exceptions authorized for certain rail operating purposes only. (a) This part prescribes the geographic limits of each of the nine standard time zones established by section 1 of the Standard Time Act, as amended by section 4 of the Uniform Time Act of 1966 (15 U.S.C. 261). The Uniform Time Act also contains lists of operating exceptions granted for specified rail carriers, whose operations cross the time zone boundaries prescribed by this part. (15 U.S.C. 265). (b) Any rail carrier whose operations cross a time zone boundary prescribed by this part may apply for an operating exception to the General Counsel, Department of Transportation, Washington, DC 20590. However, each rail carrier for which an operating exception is granted shall, in its advertisements, time cards, station bulletin boards, and other publications, show arrival and departure times in terms of the standard time for the place concerned. (c) The time zones established by the Standard Time Zone Act, as amended by the Uniform Time Act of 1966, are Atlantic, eastern, central, mountain, Pacific, Alaska, Hawaii-Aleutian, Samoa, and Chamorro. [Amdt. 71-11, 35 FR 12318, Aug. 1, 1970, as amended by Amdt. 71-21, 52 FR 41631, Nov. 18, 1986; 78 FR 15884, Mar. 13, 2013] § 71.2 Annual advancement of standard time. (a) The Uniform Time Act of 1966 (15 U.S.C. 260a(a)), as amended, requires that the standard time of each State observing Daylight Saving Time shall be advanced 1 hour beginning at 2 a.m. on the second Sunday in March of each year and ending at 2 a.m. on the first Sunday in November. This advanced time shall be the standard time of each zone during such period. The Act authorizes any State to exempt itself from this requirement. States in two or more time zones may exempt either the entire State or may exempt the entire area of the State lying within either time zone. (b) Section 3(b) of the Uniform Time Act of 1966 (15 U.S.C. 260a(b)) provides that “it is the express intent of Congress * * * to supersede any and all laws of the States or political subdivisions thereof insofar as they may now or hereafter provide for advances in time or changeover dates different from those specified in [section 3(a) of that Act]”, which are those specified in paragraph (a) of this section. [Amdt. 71-11, 35 FR 12318, Aug. 1, 1970, as amended by Amdt. 71-21, 52 FR 41631, Nov. 18, 1986; 78 FR 15885, Mar. 13, 2013] § 71.3 Atlantic zone. The first zone, the Atlantic standard time zone, includes that part of the United States that is between 52°30″ W. longitude and 67°30″ W. longitude and that part of the Commonwealth of Puerto Rico that is west of 67°30″ W. longitude, but does not include any part of the State of Maine. § 71.4 Eastern zone. 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. § 71.5 Boundary line between eastern and central zones. (a) Minnesota-Michigan-Wisconsin. (b) Indiana-Illinois. (c) Kentucky. (d) Tennessee. (e) Georgia-Alabama. (f) Florida. (g) [Reserved] (h) Municipalities on boundary line. [Amdt. 71-11, 35 FR 12318, Aug. 1, 1970, as amended by Amdt. 71-12, 37 FR 11972, June 16, 1972; Amdt. 71-13, 38 FR 9229, Apr. 12, 1973; Amdt. 71-14, 38 FR 13725, May 25, 1973; Amdt. 77-13, 42 FR 56610, Oct. 27, 1977; Amdt. 91-17, 56 FR 52003, Oct. 17, 1991; 65 FR 50158, Aug. 17, 2000; 71 FR 3245, Jan. 20, 2006; 72 FR 6177, Feb. 9, 2007; 72 FR 54377, Sept. 25, 2007] § 71.6 Central zone. (a) Central zone in general. (b) Specified rail carrier exemptions. [78 FR 15885, Mar. 13, 2013] § 71.7 Boundary line between central and mountain zones. (a) Montana-North Dakota. (b) South Dakota. From the junction of the North Dakota-South Dakota boundary with the Missouri River southerly along the main channel of that river to the crossing of the original Chicago & North Western Railway near Pierre; thence southwesterly to the northern boundary of Jones County at the northeast corner of the NE 1, Sec. 6, T. 2 N., R. 30 E.; thence west along the northern boundary of Jones County; thence south along the western boundaries of Jones, Mellette and Todd Counties to the South Dakota-Nebraska boundary. (c) Nebraska. (d) Kansas-Colorado. (e) Oklahoma-Texas-New Mexico. (f) [Reserved] (g) Municipalities on boundary line. [Amdt. 71-11, 35 FR 12318, Aug. 1, 1970, as amended by Amdt. 71-14, 38 FR 13725, May 25, 1973; Amdt. 71-16, 43 FR 42763, Sept. 21, 1978; 55 FR 30914, July 30, 1990; 57 FR 48339, Oct. 23, 1992; 68 FR 43336, July 22, 2003; 68 FR 49373, Aug. 18, 2003; 68 FR 61372, Oct. 28, 2003; 75 FR 60007, Sept. 29, 2010; 78 FR 15885, Mar. 13, 2013] § 71.8 Mountain zone. The fourth zone, the mountain standard time zone, includes that part of the United States that is west of the boundary line between the central and mountain standard time zones described in § 71.7 and east of the boundary line between the mountain and Pacific standard time zones described in § 71.9. § 71.9 Boundary line between mountain and Pacific zones. (a) Montana-Idaho-Oregon. (b) Utah-Nevada-Arizona-California. (c) [Reserved] (d) Municipalities on boundary line. [Amdt. 71-11, 35 FR 12318, Aug. 1, 1970, as amended by Amdt. 71-14, 38 FR 13725, May 25, 1973; 64 FR 56707, Oct. 21, 1999; 78 FR 15885, Mar. 13, 2013] § 71.10 Pacific zone. The fifth zone, the Pacific standard time zone, includes that part of the continental United States that is west of the boundary line between the mountain and Pacific standard time zones described in § 71.9, but does not include any part of the State of Alaska. (Act of March 19, 1918, as amended by the Uniform Time Act of 1966 and Pub. L. 97-449, 15 U.S.C. 260-264; 49 CFR 1.59(a)). [Amdt. 71-19, 48 FR 43281, Sept. 22, 1983] § 71.11 Alaska zone. The sixth zone, the Alaska standard time zone, includes the entire State of Alaska, except as provided in § 71.12 of this title. (Act of March 19, 1918, as amended by the Uniform Time Act of 1966 and Pub. L. 97-449, 15 U.S.C. 260-264; 49 CFR 1.59(a)). [Amdt. 71-19, 48 FR 43281, Sept. 22, 1983, as amended by Amdt. 71-20, 48 FR 55289, Dec. 12, 1983] § 71.12 Hawaii-Aleutian zone. The seventh zone, the Hawaii-Aleutian standard time zone, includes the entire State of Hawaii and, in the State of Alaska, that part of the Aleutian Islands that is west of 169 degrees 30 minutes west longitude. (Act of March 19, 1918, as amended by the Uniform Time Act of 1966 and Pub. L. 97-449, 15 U.S.C. 260-264; 49 CFR 1.59(a)). [Amdt. 71-19, 48 FR 43281, Sept. 22, 1983, as amended by Amdt. 71-20, 48 FR 55289, Dec. 12, 1983] § 71.13 Samoa zone. The eighth zone, the Samoa standard time zone, includes that part of the United States that is between 169 degrees 30 minutes west longitude and 172 degrees 30 minutes west longitude, but does not include any part of the States of Hawaii and Alaska. (Act of March 19, 1918, as amended by the Uniform Time Act of 1966 and Pub. L. 97-449, 15 U.S.C. 260-264; 49 CFR 1.59(a)). [Amdt. 71-19, 48 FR 43281, Sept. 22, 1983, as amended by Amdt. 71-20, 48 FR 55289, Dec. 12, 1983] § 71.14 Chamorro Zone. The ninth zone, the Chamorro standard time zone, includes the Island of Guam and the Commonwealth of the Northern Mariana Islands. [68 FR 49712, Aug. 19, 2003]

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