Key legal question
Whether the revision ground of biased composition under Art. 121 lit. a BGG was met because of alleged appearance of bias of Federal Judge Zünd.
Extracted holding
No. The alleged geographic proximity, home municipality, and shared party affiliation with a cantonal politician did not objectively justify an appearance of bias.
Extracted reasoning
A judge's home municipality or mere party affinity with a political office-holder involved in the underlying dispute does not, by itself, create objective doubts as to impartiality. The applicant failed to show concrete circumstances suggesting personal involvement or prejudice.