435 U.S. 389 98 S.Ct. 1123 55 L.Ed.2d 364 CITY OF LAFAYETTE, LOUISIANA and City of Plaquemine, Louisiana, Petitioners,v.LOUISIANA POWER & LIGHT COMPANY. No. 76-864. Argued Oct. 4, 1977. Decided March 29, 1978. Syllabus Petitioner cities, which own and operate electric utility systems both within and beyond their respective city limits as authorized by Louisiana […]