
The National Park Service (NPS) is an agency of the United States federal government that manages all U.S. national parks, many American national monuments, and other conservation and historical properties with various title designations. It was created on August 25, 1916, by Congress through the National Park Service Organic Act. It is an agency ...
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http://en.wikipedia.org/wiki/National_Park_Service

(from the article `national monument`) ...the American Antiquities Act passed earlier that year. Many more were added during the next few years. Their jurisdiction, originally assigned to ... ...by the president. The zoning of private property is handled by the Zoning Commission, consisting of the mayor, the chairman of the city council...
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http://www.britannica.com/eb/a-z/n/14

[
n] - an agency of the Interior Department responsible for the National Parks
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http://www.webdictionary.co.uk/definition.php?query=National%20Park%20Servi
noun an agency of the Interior Department responsible for the national parks
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https://www.encyclo.co.uk/local/20974

the branch of the United States government which controls public lands in the national park system, including Yellowstone National Park where wolves were reintroduced in 1995.
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https://www.encyclo.co.uk/local/22350

a division of the Department of the Interior, created in 1916, that administers national parks, monuments, historic sites, and recreational areas.
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https://www.infoplease.com/dictionary/national-park-service
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