[Code of Federal Regulations] [Title 36, Volume 1] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 36CFR5.3] [Page 43] TITLE 36--PARKS, FORESTS, AND PUBLIC PROPERTY CHAPTER I--NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR PART 5_COMMERCIAL AND PRIVATE OPERATIONS--Table of Contents Sec. 5.3 Business operations. Engaging in or soliciting any business in park areas, except in accordance with the provisions of a permit, contract, or other written agreement with the United States, except as such may be specifically authorized under special regulations applicable to a park area, is prohibited.