The regulations within each zone district shall apply uniformly to every proposed development therein. No building, structure or land area shall, after adoption of this chapter, be erected, used or altered unless to conform with the regulations in the zone district containing the property to be developed, or unless a variance has been granted by the Zoning Hearing Board allowing specific modification of the regulations. No yard or lot area or off-street parking space required by one building, structure or land use shall be credited to another building, structure or use. No yard or lot or off-street parking area shall be reduced in size or number so as to be less than the minimums prescribed for the zone district. Land henceforth annexed by the Borough shall be placed in the Agricultural Zone District until Council amends this chapter to place the annexed area in the most appropriate district.