C.F.R. » Title 36 » CHAPTER V—SMITHSONIAN INSTITUTION › PART 520—RULES AND REGULATIONS GOVERNING THE BUILDINGS AND GROUNDS OF THE NATIONAL ZOOLOGICAL PARK OF THE SMITHSONIAN INSTITUTION

36 C.F.R. § 520.10

Placards, signs, banners, and flags

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The displaying or carrying of placards, signs, banners, or flags is prohibited unless officially authorized.