er person's trade or business (other than casual off-farm production),`(II) for use by such other person as a fuel in a trade or business, or`(III) who sells such alcohol at retail to another person and places such alcohol in the fuel tank of such other person, or`(ii) is used or sold by such producer for any purpose described in clause (i).`(C) CELLULOSIC ALCOHOL- For purposes of this paragraph,