Radio, television, citizen band and other antennas shall be permitted only as accessory structures in all districts and shall not exceed a height of 65 feet in the I-60 Districts and 50 feet in any other district as measured from the highest point of the antenna to the mean ground level beneath the antenna. If the antenna support structure is mounted on a building, the mean ground level around the building shall be used to determine height. The antenna structure shall be set back from all property lines a distance equal to the length of the antenna and support structure as measured from the highest point of the antenna to the base of the antenna support structure. Guy wires and other lateral supports shall not be subject to these setback requirements.