A. Every vendor of ice in the city shall, at the time of actual delivery of any ice sold, weigh the quantity of ice delivered, and for that purpose shall use a steelyard balance or other apparatus for weighing such ice, which shall have been duly adjusted and sealed by a duly appointed sealer of weights and measures in accordance with the provisions of the laws of the city; and all ice delivered to consumers within the city shall be sold by avoirdupois weight unless it is otherwise specially agreed upon between the buyer and the seller.

B. Each and every pair of ice tongs used in the delivery of ice within the city shall have prominently and conspicuously stamped thereon the exact and true avoirdupois weight of said tongs. [Code 1980 at § 15.58.030].