It shall be unlawful for any person to put up or maintain, or suffer to be put up or maintained, any sign, banner, or streamer or other device for advertising or business purposes, by suspending the same across any of the streets or sidewalks of this city. Nothing contained in this section shall be construed to prohibit the suspension of national flags, banners, and streamers in connection with public parades or celebrations.
('74 Code, § 92.09) Penalty, see § 95.99