§ 557.  License  provisions  and posting. Such license shall state the  name  and  address  of  the  licensee,  and  if  the licensee be a  co-partnership  or association, the names of the members thereof, and if  a corporation the date and place  of  its  incorporation.  Such  license  shall  be  kept  conspicuously  posted in the office of the licensee and  shall not be transferable or assignable.