What are the regulations for LED screen billboards facing the street?

It is not allowed to hang, post, or write promotional slogans and advertising signs, signs, stickers, or set up external electronic display screens on the facades, roofs, doors and windows of buildings (structures) facing the street without authorization; Propaganda slogans and advertising signs, signs, stickers, or external electronic displays shall not be posted or written without authorization on the transparent glass curtain walls, doors and windows of buildings (structures) facing streets in side and key areas.