Questione giuridica chiave
Whether a representative in Federal Court appeal proceedings must file a written power of attorney.
Decisione estratta
Yes. Under federal procedural law, a party representative must produce a written power of attorney before the Federal Court.
Motivazione estratta
Cantonal rules on whether a power of attorney was needed do not govern proceedings before the Federal Court. For that forum, Art. 75 OG, together with Art. 85 OG and Arts. 28 and 40 BZP, requires written authorization as proof of representation.