Precinct No. 70 is bounded on the north by 44th Street, and 44th Street produced easterly to the east line of Section 31, Township 29 North, Range 5 E.W.M.; on the east by the east line of said Section 31; on the south by 48th Street, 48th Street produced easterly to the east line of said Section 31 and by Wilmington Avenue; and on the west by Grand Avenue. (Prior code § 1.62.710.)