All territory hereafter annexed to the City of Atlanta shall be temporarily classified in the Agricultural and Estate District until permanent zoning classification[s] are given the area by the City Council of the City of Atlanta.

The procedure for establishing appropriate zoning on any annexed territory shall be the same as set forth in Section 14 for the amendment of the Zoning Ordinance.

Upon annexation of territory, the Planning and Zoning Commission shall study the newly annexed area and hold necessary public hearings to determine the proper zoning of such land at that time. The Planning and Zoning Commission shall make a recommendation to the City Council within six (6) months after annexation.