ma, for Appellants. Cary A. Farris, John K. Linker, J. Shannon Gatlin, ALANIZ SCHRAEDER LINKER FARRIS MAYES, LLP, Houston, Texas; Dirk C. Phillips, Sarah M. Harris, ARNOLD & PORTER LLP, Washington, D.C.; J. Tracy Walker, IV, Robert L. Hodges, Matthew A. Fitzgerald, MCGUIREWOODS, LLP, Richmond, Virginia, for Ap