No. 89-1857. April 18, 1990. R. David Benavides, John Wheat Gibson, Dallas, Tex., for plaintiffs-appellants. James Reynolds, Asst. U.S. Atty., Sp. Asst., Marvin Collins, Myrna Silen, Asst. U.S. Atty., Dallas, Tex., for defendants-appellees. Ronald C. Chandler, Dist. Director, INS, Dallas, Tex., John B.Z. Chaplinger, Dist. Director, INS, New Orleans, La., for other Interested Parties. Appeal from the United States District Court for the Northern District of Texas. Before HIGGINBOTHAM, JONES, and SMITH