The following regulations shall apply to any areas annexed to the Municipality:
(a) If any lots, tracts, or lands are not subject to zoning at the time of their annexation, they shall be classified into whichever districts established by this Ordinance most closely resembles the existing uses at the time of the annexation. Such classification shall be approved by Council Resolution.
(b) Any lots, tracts, or areas which are subject to zoning at the time of their annexation shall be classified as being in whichever district established by this Ordinance most closely resembles the zoning district that existed in the annexation.
(c) With respect to any annexation, the Planning Commission shall, within ninety (90) days, conduct a public hearing on the matter of a Municipal zoning classification.