Key legal question
Whether the appeal against the refusal to stay the Federal Administrative Court proceedings is immediately admissible under Art. 93 BGG.
Extracted holding
The refusal to stay does not create irreparable legal harm; the appeal is not admissible.
Extracted reasoning
A stay decision only delays the case and the challenged issue of foreseeability can be decided independently of the future definitive operating regulations. Any practical disadvantage is not a non-reparable legal detriment.