Amendments to this Zoning Code may involve an amendment of the text of this Zoning Code or the Zoning Map and may be initiated in one of the following ways:
(a) By adoption of a motion by the Planning and Zoning Commission.
(b) By adoption of an ordinance by the City Council.
(c) By the filing of an application by at least one property owner or authorized representative within the area proposed to be changed or affected by said amendment.