(a) A fish processor or primary fish buyer shall purchase raw fish by the pound. The poundage of the fish to be purchased shall be determined by weighing the fish unless both the buyer and seller agree in writing upon a sample weighing technique that will fairly determine the average weight of the fish purchased.
(b) A person who violates this section is guilty of a misdemeanor and upon conviction is punishable by imprisonment for not more than one year, or by a fine of not more than $5,000, or by both.