The following counties are designated as the citrus zone of this state: Cameron, Willacy, Hidalgo, Starr, Zapata, Jim Hogg, Brooks, Kenedy, Kleberg, Nueces, Jim Wells, Duval, Webb, San Patricio, Refugio, Bee, Live Oak, McMullen, LaSalle, Dimmit, Maverick, Zavala, Frio, Atascosa, Wilson, Karnes, DeWitt, Victoria, Goliad, Calhoun, and Aransas.