Question juridique clé
Who must bear the costs and party compensation of the Federal Administrative Court proceedings after annulment of ElCom's tariff item?
Solution extraite
Swissgrid is to be treated as the losing necessary opposing party, so the costs and compensation may be charged to it rather than to ElCom.
Motifs extraits
Swissgrid's tariff decision concerned its revenue; the complainants' success reduced Swissgrid's income. Even without a formal request in the main matter, Swissgrid remained a necessary opposing party and therefore bore the procedural consequences of losing.