(A) All the territory hereafter annexed to the village, located east of the Baltimore and Ohio Railroad shall be in "AA-1" Single-Family Residence District and all territory hereafter annexed to the village, located west of the Baltimore and Ohio Railroad, shall be in the "AA-2" Single-Family Residence District until changed by ordinance.
(B) Whenever any street, alley, or other public way is vacated by the Village Council, the zoning districts adjoining each side of such street, alley, or public way shall be automatically extended to the center of such vacation and all area included in the vacation shall then and henceforth be subject to all appropriate regulations of the extended districts.