From and after the delivery of such deed of cession, the said site and tract of land, and the erections, structures, buildings, fixtures, goods, chattels, and property at any time thereon or thereto belonging, or in any wise appertaining and belonging to the United States of America, shall be and remain released and exempt from all tollages, taxes, and assessments of every name, nature, character, and description, for and during the time the United States of America shall remain the owner thereof.