No person holding a permit for the retail sale of alcoholic liquor shall purchase for resale alcoholic liquor except from a person holding a permit under the provisions of sections 30-16 and 30-17, provided any permittee going out of business may, upon application to and approval by the Department of Consumer Protection, sell all or part of his stock in trade to any permittee authorized by law to retail the kind of liquors so sold. No person holding a manufacturer or wholesaler permit shall purchase for resale alcoholic liquor except from a person holding a manufacturer permit, wholesaler permit or out-of-state shipper’s permit. Any person convicted of a violation of this section shall be subject to the penalties provided in section 30-113.