The Historic Sites Act of 1935 was enacted by the United States Congress largely to organize the myriad federally own parks, monuments, and historic sites under the National Park Service and the United States Secretary of the Interior. However, it is also significant in that it declared for the first time "...that it is a national policy to preserve for public use historic sites, buildings, and objects of national significance...". Thus it is the first assertion of historic preservation as a government duty, which was only hinted at in the 1906 Antiquities Act.