All persons, firms and corporations within the City who operate, maintain, conduct or engage in the business of dispensing automobile gasoline to the general public, are hereby required to display the price of gasoline offered for sale to any person in a prominent place upon each business location, so as to be viewed by the motoring public, with letters at least 5 inches in height. The display of prices shall be at such location as to be observed by the motoring public from each side of any street which the establishment dispensing gasoline is located upon.
   In the event gasoline is dispensed or sold by any such establishment in varying prices or limited amounts or quantities at any one time, said prices, conditions or limitations shall be fully displayed so as to be observable by the motoring public from the street or read passing in front of the establishment dispensing such gasoline.