[Code of Federal Regulations] [Title 36, Volume 3] [Revised as of July 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 36CFR331.19] [Page 33] TITLE 36--PARKS, FORESTS, AND PUBLIC PROPERTY CHAPTER III--CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY PART 331--REGULATIONS GOVERNING THE PROTECTION, USE AND MANAGEMENT OF THE FALLS OF THE OHIO NATIONAL WILDLIFE CONSERVATION AREA, KENTUCKY AND INDIANA--Table of Contents Sec. 331.19 Commercial activities. Unless otherwise authorized in writing by the District Engineer, the engaging in or solicitation of business or money is prohibited.