In every zoning district, every building or structure built, structurally altered, enlarged, increased in capacity, or changed in use, and every land use initiated or extended subsequent to the adoption of this Zoning Code, shall provide off-street parking facilities in accordance with the regulations of this Zoning Code. The provisions of this Zoning Code are exempted for all uses in the "B-3" Central Business District; however, when off-street parking is provided in the "B-3" District, such lots shall meet the applicable standard of this Zoning Code.