(A) Application. The provisions of this title governing the use of land, buildings and structures, the size of yards, abutting buildings and structures, the height and bulk of buildings, the density of population, standards of performance and other provisions are in effect upon all land included within the boundaries of each and every zone established by the title.
(B) Buildings under construction. Any building for which a permit has been issued under the provisions of earlier ordinances of thee city which are in conflict with the title and on which substantial construction has been performed by integration of materials on the site before the effective date of the ordinance codified in this title may nevertheless be continued and completed in accordance with the plans and specifications upon which the permit was issued.
(`78 Code, § 17.02.060.)