Substantial evidence to demonstrate that no existing facility is suitable shall consist of any of the following: a) An affidavit demonstrating that the applicant made diligent efforts to install or co-locate on existing towers and other existing structures within a 1km radius in rural area or 500 m in urban area of the proposed tower site, as determined by a qualified radio frequency engineer. b) An affidavit demonstrating that existing towers and structures located within a 1 km radius (rural area) or 500 m (urban area) of the proposed tower site don’t have the capacity to provide reasonable technical service consistent with the applicant’s technical system. c) Written technical evidence from a qualified structural engineer that existing towers and structures within a 1km radius (rural area) or 500 m (urban area) of the proposed tower site are not of sufficient height to meet the applicable requirements. d) Written technical evidence from a qualified structural engineer that existing towers and structures within the area don’t have sufficient structural strength to support the proposed facility. e) A written statement from a qualified telecommunications engineer submitting technical evidence showing that the existing towers and structures within the geographic search area are incompatible due to electromagnetic /radiofrequency interference and that antenna on the existing tower or structure cannot be relocated on the existing structure to accommodate additional users. f) An affidavit that the fees or costs required by the owner to share an existing tower or structure within geographic search area, or to adapt an existing tower or structure within the area are unreasonable. Costs exceeding new tower development are presumed to be unreasonable. g) The applicant demonstrates that there are other limiting factors that render existing towers and structures within a 1km radius (rural area) or 500m (urban area) of the proposed tower site unsuitable. 4.2.5 Co-location on existing infrastructures 4.2.5.1 RURA also requires that existing mobile sites are similarly be made available for site sharing. Accordingly, a Licensee may request to share an existing mobile site of another Licensee. In this regard, the licensees shall endeavor to cooperate in order to facilitate the prompt and efficient 12