Any person who ships into this state any package or carton containing alcoholic liquor shall, for each offense, be subject to any penalty set forth in section 30-55, unless (1) the contents of such package or carton are clearly marked on the outside of such package or carton, and (2) such person conditions delivery of such alcoholic liquor upon the signature of an individual who is (A) at least twenty-one years of age, or (B) legally authorized to receive such alcoholic liquor under the provisions of this chapter.