The exterior of each vending vehicle shall display, in lettering at least three inches in height, the name, address and telephone number of the owner. A distinctive identifying number or symbol assigned by the County of San Diego Department of Environmental Health shall be displayed on the windshield of each vending vehicle. (Ord. 3432 § 3, 2018; Ord. 954 § 2; Ord. 855 § 2; prior code § 15.64).