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5.5.4.    STANDARDS
   In addition to other applicable standards in other sections of the , such as and screening, the following standards are required of in the GCZ:
   A.   Signs
   Signs as permitted by Article 7A, Sign Standards, are allowed within the required landscaped area with the exception of billboards. Billboards are not permitted within 400 feet of the .
   B.   
      1.   New
         a.   New for on private and on public along shall be underground unless relief is otherwise granted pursuant to UDC sections 5.3.14, Variances or through a Zoning Examiner special exception process per section 4.9.11.A.12.
         b.   Existing poles shall be used to provide the required transition to underground service to new   to . When necessary to serve new , a new pole set in line with, but not extending, an existing overhead system used to serve new is not considered a new utility.
         c.   Upgrades and reinforcements of existing overhead facilities are allowed to the extent that the total number of electrical circuits or communication cables is not increased.
      2.   Existing
      Where an existing is expanded in or land area to any degree, new and existing to all portions of the shall be located underground unless relief is otherwise granted pursuant to UDC sections 5.3.14, Variances or through a Zoning Examiner special exception process per section 4.9.11.A.12. Additions to single-family dwellings are exempt from this provision. Additions to single- dwellings are exempt from this provision.
      3.   Relocation of
      Relocation of overhead utility facilities required by public improvement districts along shall conform with existing franchise requirements.
(Am. Ord. 11803, 12/8/2020; Am. Ord. 11942, 7/12/2022)
5.5.5.   DESIGNATION, AMENDMENT, OR CHANGE OF BOUNDARIES
   Designation, amendment, or change of boundaries for a shall be established through the amendment to the designation on the MS&R Map in accordance with Section 5.4.3, MS&R Adoption and Amendment.
5.5.6.   VARIANCES
   Variances to the Gateway Corridor standards are processed in accordance with Sections 3.10.1 and 3.10.3, Board of Adjustment Variance Procedure. The Design Review Board shall review variance requests as provided in Section 2.2.6.C.6 and forward its recommendations to the Board of Adjustment.
5.6.    ENVIRONS (AEZ)
5.6.1.   PURPOSE
   The purpose of this overlay is to protect the health, safety, and welfare of and property in the vicinity of Tucson International (TIA) and Davis-Monthan Air Force Base (DMAFB) and protect the long term viability of DMAFB. This is accomplished by: (1) Reducing noise and safety hazards associated with aircraft operations; (2) preserving the operational stability of these ; and (3) assisting in the implementation of policies and recommendations in the ’s and Environs Plan, the ), and the and the Davis-Monthan Joint Land Study (DMJLUS). The overlay further:
   A.   Promotes the of uses with aircraft operations through the establishment of standards for the regulation of and ;
   B.   Addresses potentially life-threatening situations in areas exposed to aircraft accident potential through restrictions on the congregation of large numbers of people or high concentrations of people and by restrictions on concentrations of people who are unable to respond to emergency situations, such as children, the elderly, the handicapped, and undergoing medical treatment;
   C.   Increases the protection of exposed to high levels of aircraft noise by requiring acoustical treatment in located within these areas and regulating those uses that are sensitive to such noise;
   D.   Prohibits uses that create potential hazards to the safe approach and departure of aircraft; and,
   E.   Recognizes the role of Davis-Monthan Air Force Base in the Tucson community and protects the ’s interest in ensuring the continued viability and operation of Davis-Monthan AFB by limiting incompatible in the (ADC).
5.6.2.   ESTABLISHMENT, DESIGNATION, AND AMENDMENT OF AEZ MAPS
   The Environs (AEZ) includes districts and that do not necessarily have the same boundaries. The boundaries of these districts and are identified for Tucson International (TIA) and for Davis-Monthan Air Force Base (DMAFB) by the Environs (AEZ) Overlay Map series kept on file in the offices of the City Clerk and the Planning and Development Services Department (PDSD). The AEZ Overlay Map series is hereby established as the official AEZ Overlay Map series, The AEZ Overlay Map became effective on May 16, 1990, as amended on January 28, 1991, April 27, 1992, October 28, 2002 and January 1, 2005.
   The AEZ is made up of the following 11 and districts (See Illustrative Maps 5.6-B and 5.6-C.):
   A.   The following and districts are established in the TIA environs:
      1.    ;
      2.    ;
      3.    ;
      4.   Noise Control District 65 (NCD 65) - High Noise District with exposures of 65-70 designated at TIA; and,
      5.   Noise Control District 70 (NCD 70 - High Noise District with exposures of 70+ designated at TIA.
   B.   The following and districts are established in the DMAFB environs:
      1.    (ADC-1) - Northwest end of DMAFB runway;
      2.    (ADC-2) - Southeast end of DMAFB runway up to 30,000 feet from end of runway;
      3.    (ADC-3) - Southeast end of DMAFB runway 30,000 to 50,200 feet from end of runway;
      4.    (NCD A) - High Noise District with exposures of 65-70 designated at DMAFB; and,
      5.    (NCD B) - High Noise District with exposures of 70+ designated at DMAFB.
   C.   The (AHD) apply to both the TIA environs and the DMAFB environs. The AHD is a specifically designated area of land where uses that constitute hazards to aircraft operations are prohibited and heights are limited.
   D.   Designation, amendment, or change of boundaries for an Environs shall be established through the amendment to the designation on the AEZ Maps in accordance with Section 3.5, Rezoning (Change of Zoning) Procedure.
5.6.3.   APPLICABILITY IN THE TIA ENVIRONS
   A.   Sections 5.6.3, 5.6.4, 5.6.5, 5.6.6, and 5.6.11 apply to the TIA environs.
   B.   Where more than one or applies to a property, the standards of all applicable districts or shall apply. Where standards conflict, the most restrictive standards shall apply.
   C.   The Environs (AEZ) applies to the following on all property located within the TIA boundaries. For property partially within the TIA, the provisions apply to only those portions within the boundaries of the AEZ. For areas outside the limits, the AEZ standards will apply upon annexation.
      1.   New ;
      2.   A change in, expansion of, or addition to the use of an existing as follows:
         a.   The residential , employee , and emergency evacuation plan and training standards of Section 5.6.5, Use for the TIA Environs, apply to the entire existing if the change, expansion, or addition results in an increase in any of the following:
            (1)   Employee ;
            (2)   Residential ;
            (3)   Number of employees; or,
            (4)   Number of of the general public for whom the was intended or designed to accommodate.
         b.   The noise attenuation standards of Section 5.6.6, Noise Control Districts, apply to the entire existing if the use of the existing is changed from any other to one or more of the following uses:
            (1)   Residential;
            (2)   Place of ; or,
            (3)   Administrative or Professional Office.
      3.   Expansion of an existing as follows:
         a.   If the of a or the on a is expanded by less than 50%, the AEZ applies only to the areas of expansion;
         b.   If the of a is expanded by 50% or more, the standards of Section 5.6.6 apply to the entire . Exception: the sound attenuation standard in this section does not apply to an expansion of the following types of existing prior to May 16, 1990:
            (1)   A single- or duplex dwelling;
            (2)   A mobile home; or,
            (3)   A manufactured housing unit.
         c.   If the on a is expanded by 50% or more, the employee , , and emergency evacuation plan and training standards of Section 5.6.5 apply to the entire .
         d.   Cumulation of Expansions. Expansions are cumulated over time from May 16, 1990. Once a or is brought into with the provisions of this section, subsequent expansions are accumulated as of the date the existing or is brought into .
      4.   Nothing contained in this section affects existing property or the right to its continued use for the purpose legally used at the time these requirements become effective, nor do these requirements affect any reasonable repairs to, or of, or property used for such existing purposes.
5.6.4.   TIA ENVIRONS
   The following provisions apply to the TIA Environs.
   A.   Permitted Uses
   The permitted are those permitted by the underlying , except as restricted by this section.
   B.   Posting of Occupancy Limitations
   Any restriction of occupancy required under this ordinance as a condition of permit issuance or certificate of occupancy shall be posted on the premises. The owner/manager(s) of the premises cannot exceed these limitations.
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