The location and boundaries of all districts established by this Title are as shown on the map entitled, “Official Zoning Map of The City of Pullman.” The map and any amendments thereto shall be dated with their effective dates and signed by the mayor and finance director. This map is referred to as the “Official Zoning Map,” and is adopted as a part of this Title by reference thereto. The district boundaries may be amended in accordance with Chapter 17.115 and such amendments shall also be adopted by reference as a part of this Title. (Ord. 87-9 §1, 1987).