Development plan approval shall be required in the Design Zone for any of the following:
(A) The erection of a structure.
(B) The moving of a structure onto the property or within the property.
(C) A structural alteration which would substantially change the exterior appearance of a structure.
(D) The erection or substantial alteration of a sign, wall or fence.
(E) The installation or alteration of outdoor lighting equipment which would substantially change the exterior appearance of the use or structure.
(F) Wherever an outdoor use is established, enlarged or changed to another use.
('64 Code, § 49.03)