The Heritage Commission shall have the same powers and duties of the Appearance Commission/Design Control Board heretofore provided by ordinance or as those powers and duties may be changed by ordinance, relating to the maintenance, safeguarding and enhancement of the distinctive architectural and historic character of the Design Control District, and in such area to protect and preserve property, promote the stability of property values and protect real estate from impairment or destruction of value, which powers shall include the authority to:
   (a)    approve or disapprove plans for the construction, improvement or renovation of structures inside the Design Control District; and
   (b)    approve or disapprove applications for certificates of appropriateness relating to structures inside the Design Control District. (Amended 11-8-11)