National Park Service Organic Act
The National Park Service Organic Act ( or simply "the Organic Act" within the National Park Service , conservationists , etc . ) is a United States federal law that established the National Park Service ( NPS ) , an agency of the United States Department of the Interior . 
<triplet> National Park Service Organic Act <subj> National Park Service <obj> has effect <triplet> National Park Service <subj> United States Department of the Interior <obj> parent organization <triplet> United States Department of the Interior <subj> National Park Service <obj> subsidiary