Question juridique clé
Whether the appeal against the interlocutory order was admissible without showing irreparable legal harm.
Solution extraite
The appellant did not demonstrate that paying the cost advance would cause irreparable legal harm; the appeal was therefore inadmissible.
Motifs extraits
The challenged decision was an interlocutory decision under Art. 93(1) BGG. Independent appealability required a non-reparable legal disadvantage, which was not substantiated.