The enumeration of particular powers by this Charter shall not be held or deemed to be exclusive but, in addition to the powers enumerated therein or implied thereby, or appropriate to the exercise of such powers, it is intended that the City of Mount Holly shall have, and may exercise, all powers which, under the Constitution of North Carolina, it would be competent for this Charter specifically to enumerate. All powers of the city, whether expressed or implied, shall be exercised in the manner prescribed by this charter, or, if not prescribed therein, then in the manner provided by ordinance or resolution of the governing body of the City of Mount Holly.