The cabinet or structure shall not contain more than one hundred (100) square feet of gross floor area or be more than ten (10) feet in height. In addition, for buildings and structures which are less than sixty-five (65) feet in height, the related unmanned equipment structure, if over the one hundred (100) feet of gross floor area or ten (10) feet in height, shall be located on the ground and shall not be located on the roof of the structure.