(1) No person shall erect or maintain any sign, as defined in § 14-1901, within 200 feet of any boundary line of Roosevelt Boulevard or of Cobbs Creek Park or Parkway which is visible from any point within the boundaries of such areas unless he has first obtained a permit to do so from the Department of Licenses and Inspections.

(2) No permit to erect or maintain any sign in the above areas shall be granted unless the sign for which such permit is sought:

(a) complies in every respect with all other applicable requirements of this Code and with the regulations of the Fairmount Park Commission;

(b) has been approved by the Art Commission.

(3) Subject to the provisions of § 14-2003 (4), a permit shall be granted for the continued maintenance of any sign lawfully in existence on the effective date of this Section without compliance required with any of the other provisions of this Section.^[419]

(4) Any sign lawfully in existence on the effective date of this Section shall not be repaired, altered or moved in any substantial manner unless it be made to comply with all the requirements of this Section.^[420]