In order to carry out the provisions of this Chapter, two subdistricts, Subdistrict A and Subdistrict B, are established. In Subdistrict B, Subarea B1 is established. The location and boundaries of these subdistricts and subarea are shown on Map 1 (Special Eastchester – East Tremont Corridor District, Subdistricts and Subareas) in the Appendix to this Chapter.