36 CFR 504.4 : Parks, Forests, And Public Property (§ 1.1 To Parts 1601-1699) — (Parts 300-311 To Parts 1601-1699) — Smithsonian Institution (Parts 500-503 To Parts 531-599) — Rules And Regulations Governing Smithsonian Institution Buildings And Grounds (§ 504.1 To § 504.16) — Conformity with signs and emergency directions.