The purpose of this chapter is to improve the quality of life and to harmonize the residential and business environments in the city. It is intended to improve the visual environment, permit signage consistent with the character of the community, and reduce signs or advertising distractions and/or obstructions that may contribute to hazards or accidents. The use of signs shall be regulated by zone. This chapter is designed to recognize the communication needs of the business community, and encourage maintenance of those signs, but also to protect the public health, safety, welfare and aesthetics by regulating outdoor signs of all types. This chapter applies to all signs as defined by Section 15.20.035.