No. 81-2272. February 15, 1984. Diana Ceresi, Washington, D.C. (William Wachter, William A. Lubbers, Gen. Counsel, John E. Higgins, Jr., Deputy Gen. Counsel, Robert E. Allen, Associate Gen. Counsel, and Elliott Moore, Deputy Associate Gen. Counsel, Washington, D.C., on brief), for petitioner. A. Randall Vehar, Washington, D.C. (Willard Owens and Marilyn Townsend, Washington, D.C., with him on brief), for respondents. Lynn Paul Mattson of Nichols Wolfe, Inc., Tulsa, Okl., on brief, for intervenor