Texas Utilities Electric Company, Petitioner, v. Federal Communications Commission and United States Ofamerica, Respondents,tci Cablevision of Dallas, Inc.; Florida Power & Lightcompany; Mfs Communications Company, Inc.; United Statestelephone Association; National Cable Televisionassociation, Inc.; Community Antenna Televisionassociation, Inc.; Utilities Telecommunications Council;duke Power Company; Continental Cablevision, Inc.;monongahela Power Company, the Potomac Edison Company Andwest Penn Power Company (aps Operating Companies); Southcarolina Electric & Gas Company; American Electric Powerservice Corporation; Carolina Power and Light Company;virginia Electric and Power Company, Intervenors