4.12.   Zoning Ordinances.
   (A)   Ordinances initiated by an applicant or Council establishing, amending, revising, changing or repealing zoning classifications, districts, uses or regulations shall be introduced in Council. Immediately after the first reading of such an ordinance, the Clerk of Council or his or her designee shall set a date for a public hearing before the Planning Commission, not earlier than fifteen days after the first reading. The Clerk of Council or his or her designee shall cause a notice of such public hearing to be published one time in a newspaper determined by Council to be of circulation within the City at least seven days prior to the date of such public hearing. The Clerk of Council or his or her designee shall mail written notice of the public hearing to the owners of the property within, contiguous to and directly across the street from the affected parcel or parcels. The failure of delivery of the notice shall not invalidate any zoning ordinance.
   (B)   Within sixty days of the public hearing referred to in subsection (A) of this section, the Planning Commission shall cause such ordinance to be returned to the Clerk of Council together with the Commission's written recommendations. Immediately after receipt of the Commission's recommendations, the Clerk of Council shall cause a notice of public hearing to be published one time in a newspaper determined by Council to be of circulation within the City at least seven days prior to the date of the public hearing. Such public hearing shall also constitute the second reading of the proposed ordinance or resolution.
   (C)   An affirmative vote of at least six Council members shall be necessary to adopt or defeat a zoning ordinance as to which the Planning Commission has recommended approval or has made no recommendation. An affirmative vote of at least seven Council members shall be necessary to adopt a zoning ordinance as to which the Planning Commission has recommended against approval.