All manufacturers, brewers, brewer sales representatives, brokers or any persons or firms whatsoever offering malt beverages for shipment into this State shall notify in writing the department and the wholesale dealer affected at least ninety days previous to any change made by them, either in their distributors or the territories of their distributors in this State. Wholesale dealers shall notify in writing the department and the shipping brewer affected at least ninety days previous to any change in either the territory or the distribution of their products. Any manufacturer, brewer, brewer sales representative, broker or any person who sells his product in violation of this provision shall forfeit the privilege of purchasing or using any beer and wine license tax crowns or lids.