436 U.S. 519 98 S.Ct. 1955 56 L.Ed.2d 505 State of CALIFORNIA et al., Petitioners,v.SOUTHLAND ROYALTY COMPANY et al. EL PASO NATURAL GAS COMPANY, Petitioner, v. SOUTHLAND ROYALTY COMPANY et al. FEDERAL ENERGY REGULATORY COMMISSION, Petitioner, v. SOUTHLAND ROYALTY COMPANY et al. Nos. 76-1114, 76-1133 and 76-1587. Argued Dec. 7, 1977. Reargued April 17, 1978. […]