C. A. D. C. Cir. Certiorari granted. Brief of petitioners is to be filed with the Clerk and served upon opposing counsel on or before 3 p.m., Friday, October 22, 1999. Brief of respondents is to be filed with the Clerk and served upon opposing counsel on or before 3 p.m., Friday, November 19, 1999. A reply brief, if any, is to be filed with the Clerk and served upon opposing counsel on or before 3 p.m., Tuesday, November 30, 1999. This Court’s Rule 29.2 does not apply.