It is further the intent of this Ordinance to confer upon the Board of Adjustment as full and complete powers as may lawfully be conferred upon such Board, including, but not by way of limitation, the authority in connection with any case, action or proceeding before the Board, to interpret and construe the provisions of this Ordinance, or any term, clause, sentence or word hereof, and the Zoning Map, in accordance with the general rules of construction applicable to legislative enactments.