The number of off-street parking spaces required under this article is reduced by one for each protected tree (as defined in Article X) retained that would otherwise have to be removed. The preserved tree must be protected from vehicular traffic through the use of concrete curbs, wheel stops, or other permanent barriers. The maximum reduction authorized by this section is five percent or one space, whichever is greater, minus the number of parking spaces currently not provided due to already existing nonconforming rights. (Ord. 22053)