Proof of the existence of a weight, measure or a weighing or measuring device in or about any building, enclosure, stand or vehicle in which or from which it is shown that buying or selling is commonly carried on, in the absence of conclusive evidence to the contrary, shall be presumptive proof of the regular use of the weight, measure or weighing or measuring device for commercial purposes and of such use by the person in charge of the building, enclosure, stand or vehicle.
(Ord. 2143, passed 7-14-1969)