(A) The following uses are deemed to be exempt from conditional zoning regulations for § 154.543(A)(5) due to their ability to comply with the general intent and purpose of this subchapter:
(1) Locating a tower or antenna, including placement of additional buildings or other supporting equipment used in connection with said tower or antenna, in any industrial or C-3 Commercial District; provided, however, that such tower shall be setback from any existing residential zoning district a distance of 500 feet;
(2) Installing an antenna on an existing structure other than a tower (such as a building, sign, light pole, water tower or other structure) that is 50 feet in height or greater, so long as said additional antenna adds no more than 20 feet to the height of said existing structure; and
(3) Installing an antenna on any existing tower of any height, so long as the addition of said antenna adds no more than 20 feet to the height of said existing tower and the total tower height after installation does not exceed a total height of 200 feet.