Effort to locate on existing structures. Before making application for any wireless communications facility to be located on a new support structure, the applicant shall demonstrate that a good faith effort was made to mount an antenna array or microfacility, whichever is applicable, on an existing structure. The applicant shall submit proof that it contacted the owners of tall structures within a one-mile radius of the site proposed, asked for permission to install the facility on those structures, offered market compensation to such owners, and was denied. These structures would include smoke stacks, water towers, tall buildings, existing or proposed support structures of other communications companies, high-tension power line towers, other communications towers (fire, police, etc.) and other tall structures.