East Boston Times reports that Logan Communications has proposed to place a 14 by 48 digital billboard on McClellan Highway property owned by a Hilton Gardens Inn.  Logan Communications will be required under state law to give 15 hours per month for state public service messages.  The City of East Boston may also request a minimum number of hours in exchange for approving the request.  Community groups are arguing that the hotel’s owner agreed to put up no large signs on the property when the hotel was originally approved.  The hotel’s owner remembers no such agreement.