Question juridique clé
Whether the complaint against the interlocutory decision on expert recusal was admissible under Art. 92 BGG.
Solution extraite
The appeal against the separately appealable interlocutory decision on recusal was admissible without requiring proof of irreparable harm.
Motifs extraits
Decisions on recusal under Art. 92 BGG are directly appealable; the irreparable-harm requirement of Art. 93(1)(a) BGG does not apply.