Cross reference—Licenses, permits and business regulations, ch. 15; commercial advertising by sound trucks, § 18-65; commercial advertising by aircraft, § 18-67; approval of banners by parks and recreation director, § 19-3; posting notices on trees, poles, etc., § 24-146; streets and sidewalks, ch. 25; zoning, ch. 30; outdoor advertising structures, § 30-1032; marquees, § 30-1042.