Boundaries of the districts, as enumerated in Section 400.030 of this Chapter, are hereby established as shown on a map prepared for that purpose, which map is hereby designated as the Use District Map; and said map and all the notations, references and information shown thereon is hereby made as much a part of this Chapter as if the same were set forth in full herein. It shall be the duty of the City Clerk to keep on file in its office an authentic copy of said map, and all changes, amendments, or additions thereto.

Whenever any street is vacated, the particular district in which the adjacent property lies shall be automatically extended to the centerline of any such street.