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