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• 426.21. Permits. Subdivision 1. Required. Except as provided in subdivision 3, no person may erect, construct, place, re-erect, reconstruct or replace an antenna or tower in the city without first making application for and obtaining a permit therefor from the building official. Subd. 2. Information. The applicant for the permit shall provide at the time of application sufficient information to indicate that the erection, construction, placement, re-erection, reconstruction or replacement will not create a safety hazard or damage to the property of other persons. In addition, the applicant shall submit a copy of the lease agreement between the applicant and the property owner. Subd. 3. Certification. Towers shall be certified by a qualified and licensed professional engineer to conform to the latest structural standards of the Uniform Building Code and the Electronics Industry Association. Subd. 4. Exceptions. Permits are not required for the adjustment, repair or replacement of elements of the antenna, provided such adjustment repair or replacement does not reduce the safety factor. 426.23. Construction. Subdivision 1. Wind. Towers with antennas shall be designed to withstand applicable wind load requirements as prescribed in the state building code. Subd. 2. Treatment. Towers shall be constructed of. or treated with, corrosive resistant material. Subd. 3. Grounding. Antennas and metal towers shall be grounded for protection against a direct strike by lightning and shall comply as to electrical wiring and connections with the national electrical code. Subd. 4. Climbing. A tower affixed to the ground shall be protected to discourage climbing of the tower by unauthorized persons. • Subd. 5. Appurtenant structures. No antenna or tower shall have affixed or attached to it, in any way, except during time of repair or installation, any platform, catwalk, crow's nest or like structure, except during periods of construction or repair. Subd. 6. All towers must be inspected once every five years by a qualified and licensed professional engineer to certify compliance with original construction standards. Results of the inspection must be submitted to the building official. 426.25. Non-conforming installations. Subdivision 1. General rule. Antenna and towers in existence on November 1, 1996 which do not conform to or comply with this section may continue to exist for the purpose now used but may not be replaced or structurally altered except as provided in subdivision 2 without complying with this section. Subd. 2. Replacement. If a non-conforming tower or antenna is damaged or destroyed the tower or antenna may be repaired and restored to its former use, location and physical dimensions upon obtaining a building permit therefor. but without otherwise complying with these regulations, provided, however, that the cost or repairing the tower to its former use, size or location does not exceed 50 percent of the cost of a new tower of like kind or quality. 426.27. Variances. The council may grant variances to the literal provisions of Sections 426.05, subd. 2, 426.07, and 426.09 in the same manner and subject to the same requirements that apply to variances granted under section 546 of the zoning code.