"Central traffic district" is hereby defined and established as follows: all streets and portions of streets within the area described as follows: beginning at the southwesterly corner of Ohio Street and First Street; thence with the south side of First Street to the east side of Avery Street; thence with the east side of Avery Street to the south side of Fourth Street; thence with the south side of Fourth Street to the east side of Green Street; thence with the east side of Green Street to the north side of Eighth Street; thence with the north side of Eighth Street to the east side of Clay Street; thence with the east side of Clay Street to the north side of East Ninth Street; thence with the north side of East Ninth Street to the east side of Avery Street; thence with the east side of Avery Street to the north side of Tenth Street; thence with the north side of Tenth Street to Murdoch Avenue; thence with the north side of Tenth Street extended in a westerly direction to the flood wall right of way; thence with the flood wall right of way in a southerly direction to the south side of First Street; thence with the south side of First Street to the place of beginning. (1947 Code §19.1)