The Council may, by ordinance or resolution: establish new departments, divisions or other sub-units thereof; abolish, revise, merge or combine departments, divisions or other sub-units thereof, whether created by this Charter or by ordinance or resolution, provided the Council shall not establish, abolish, merge or combine any department which is headed by an official elected by the people of the City; and from time to time may provide for the powers, duties and functions of the administrative departments, divisions and other sub-units thereof, provided such ordinances and resolutions are consistent with this Charter.