The counties of Cochise, Gila, Graham, Greenlee, La Paz, Maricopa, Pima, Pinal, Santa Cruz, and Yuma in the State of Arizona.

The counties of Imperial, Los Angeles, Orange, Riverside, San Bernardino, San Diego, and Ventura in the State of California.

The counties of Catron, Chaves, Dona Ana, Eddy, Grant, Hidalgo, Lincoln, Luna, Otero, Sierra, and Socorro in the State of New Mexico.

The counties of Atascosa, Bandera, Bee, Bexar, Brewster, Brooks, Cameron, Coke, Concho, Crane, Crockett, Culberson, Dimmit, Duval, Ector, Edwards, El Paso, Frio, Gillespie, Glasscock, Hidalgo, Hudspeth, Irion, Jeff Davis, Jim Hogg, Jim Wells, Karnes, Kendall, Kenedy, Kerr, Kimble, Kinney, Kleberg, La Salle, Live Oak, Loving, Mason, Maverick, McMullen, Medina, Menard, Midland, Nueces, Pecos, Presidio, Reagan, Real, Reeves, San Patricio, Shleicher, Sutton, Starr, Sterling, Terrell, Tom Green 1 Upton, Uvalde, Val Verde, Ward, Webb, Willacy, Wilson, Winkler, Zapata, and Zavala in the State of Texas.