Requiring the commissioner of public safety to prescribe standards for identification of beer kegs; prohibiting off-sale beer retailers from selling beer kegs without identification numbers assigned or approved by the commissioner and specifying certain retailer recordkeeping requirements relating to keg sales, requiring availability to the commissioner for inspection; requiring a refundable deposit on beer kegs sold for return in addition to the purchase price; prohibiting false record entries or statements and the possession of beer kegs without identification (mk)