[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: 36CFR504.9] [Page 54] TITLE 36--PARKS, FORESTS, AND PUBLIC PROPERTY CHAPTER V--SMITHSONIAN INSTITUTION PART 504--RULES AND REGULATIONS GOVERNING SMITHSONIAN INSTITUTION BUILDINGS AND GROUNDS--Table of Contents Sec. 504.9 Placards, signs, banners and flags. The displaying or carrying of placards, signs, banners, or flags is prohibited unless officially authorized.