The following procedures shall apply for establishing zoning in areas annexed to the City:
(a) Interim Zoning. Upon annexation and until permanent zoning is adopted as provided in subsection (b) hereof, each parcel of annexed land shall be automatically zoned to the district in this Zoning Ordinance which most closely conforms to the previous township zoning district. Any land not subject to zoning at the time of annexation shall be automatically zoned R-1 Single-Family Residential until the permanent zoning is adopted.
(b) Permanent Zoning. Within a reasonable time after annexation, permanent zoning shall be established for all annexed areas according to the procedures set forth in this Chapter concerning Planning Commission review and recommendation, and hearing and final action by Council.