Zone No. 1-         Beginning at the DeWitt-Victoria County line on U.S. Highway 87 thence south along U.S. Highway 87 to the junction of U.S. Highway 59 at the city of Victoria, thence east along U.S. Highway 59 to the Victoria-Jackson County line, thence north along the Victoria-Jackson County line to the Victoria-Lavaca County line, thence north along the Victoria-Lavaca County line to the corner of Victoria, Lavaca, and DeWitt County lines, thence west along the Victoria DeWitt County line to the point of beginning