Key legal question
Whether the appeal against the incidental recusal decision was admissible under Art. 92 LTF
Extracted holding
A separate appeal in principle lies against a separately notified incidental decision on recusal in a social-insurance case, subject to the other admissibility requirements.
Extracted reasoning
Art. 92 LTF allows immediate review of decisions on competence or recusal; because the underlying case would itself be reviewable, the incidental decision could in principle be appealed immediately.