7.7.3.   APPLICABILITY
   The provisions of this section apply to all as listed below.
   A.   New
   All new proposed in the City of Tucson shall comply with the standards of this section.
   B.   Expansions of Existing
      1.   If the expansion is less than 25%, the standards of this section apply only to the proposed expansion area.
      2.   If the expansion is 25% or greater or if expansions after March 24, 1997, cumulatively result in a 25% or greater expansion in land area, , , or , the standards of this section apply to the proposed expansion area and the remaining undeveloped .
   C.   Concurrent Applicability of Other Related Sections
   The standards of this section; the Hillside Development (HDZ) (Section 5.2); the Environmental Resource (ERZ) (Section 5.7); the Watercourse Amenities, Safety, and Habitat (WASH) ordinance (Section 29 of the Tucson Code); the Scenic Corridor (SCZ) (Section 5.3); and the Landscape and Screening Standards (Section 7.6) are all calculated separately. Plants or areas preserved or planted for the purposes of compliance with one standard may be considered for the purposes of compliance with this section.
   D.   Exceptions
   The provisions of this section do not apply to the following:
      1.   Single- residential on recorded before March 24, 1997, or single- residential on a within a that is subject to an approved after the sale and of a principal on that ;
      2.   Single- residential for which a tentative has been submitted or approved prior to July 1, 1997, per Article 8, Standards, provided the is recorded within one year from the approval date of the final , is in place, and 50% of the are developed within five years after July 1, 1997;
      3.    on a that does not contain any plant on the List as demonstrated by the applicant and subject to approval through procedures established at the Planning and Development Services Department (PDSD). This application can be submitted prior to an applicable review process and approved for an exception on the . The approved exception is valid for up to one year from the date of the approval; or,
      4.    on a or that contains that will not be substantially impacted by on the as demonstrated by the applicant per this section and subject to approval through procedures established at the PDSD, provided that construction occurs per the approved plan.