488 U.S. 105 109 S.Ct. 414 102 L.Ed.2d 408 PITTSTON COAL GROUP, et al., Petitionersv.James SEBBEN et al. Ann McLAUGHLIN, Secretary of Labor, et al., Petitioners v. James SEBBEN et al. DIRECTOR, OFFICE OF WORKERS’ COMPENSATION PROGRAMS, UNITED STATES DEPARTMENT OF LABOR, Petitioner v. Charlie BROYLES et al. Nos. 87-821, 87-827 and 87-1095. Argued Oct. […]