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November 07, 1978 -
PARK gained part of Yellowstone National Park, which had remained a non-county area in Montana. Act passed 19 April 1977; approved by PARK voters 7 November 1978.
(Mont. Laws 1977, 45th leg., ch. 447/pp. 1407-1411; Montana Code Annotated, "Descriptions--County Boundaries," 62)
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October 20, 1932 -
November 07, 1978
PARK lost territory as the boundaries of Yellowstone National Park were expanded to include an area known as the "Game Ranch." County boundaries were defined to exclude land within Yellowstone National Park.
(Haines, 2: 331-333; U.S. Stat., vol. 44, ch. 399 [1926]/pp. 655-657)
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March 01, 1929 -
October 20, 1932
PARK lost territory as the boundaries of Yellowstone National Park were expanded. County boundaries were defined to exclude land within Yellowstone National Park.
(U.S. Stat., vol. 45, ch. 437 [1929]/pp. 1435-1436; Haines, 2: 325-331)
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June 01, 1921 -
March 01, 1929
PARK exchanged with MEAGHER when boundary was adjusted to run on federal land survey lines.
(Mont. Rev. Code 1921, sec. 4337/pp. 1598-1599)
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March 08, 1913 -
June 01, 1921
PARK exchanged with GALLATIN when boundary was adjusted to run on federal land survey lines.
(Mont. Laws 1913, 13th leg., ch. 60/pp. 113-116)
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May 01, 1895 -
March 08, 1913
PARK lost to creation of CARBON. Act passed 4 March 1895; took effect 1 May 1895.
(Mont. Laws 1895, 4th leg., pp. 49-54)
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March 05, 1895 -
May 01, 1895
PARK lost to creation of SWEET GRASS.
(Mont. Laws 1895, 4th leg., pp. 54-58)
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May 01, 1887 -
March 05, 1895
PARK created by Montana Territory from GALLATIN. Act passed 23 February 1887; took effect 1 May 1887.
(Mont. Terr. Laws 1887, 15th leg., pp. 1238-1242)
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