To provide for orderly development and eliminate duplication and uncertainty, a definite system of finding dwellings and business locations rapidly and with certainty is needed in the interest of public health, welfare and safety for the city. It is necessary to enable emergency vehicles to respond quickly to calls, expedite postal and other delivery services, eliminate confusion and error and locate business places and residences for customers and friends without difficulty and loss of time. (Ord. 459 § 51 (part), 1991: prior code § 21A-1.010)