If one is offered an Aliya, can he give the honor to someone else? By “offered” I mean the Gabbai issues the Aliyas prior to the Torah service in the form of, say, a card with number of the Aliya printed on it. The recipient could of course accept the honor or decline it. If he accepts, can he make a unilateral decision to give the honor to someone else? Would the answer change if the Gabbai calls people to the bimah during the Torah reading?