Key legal question
Whether the Federal Office had standing to appeal the cantonal remand judgment immediately.
Extracted holding
The Office could not challenge the remand decision immediately because it had not participated below and showed no irreparable harm; article 93 LTF was not satisfied.
Extracted reasoning
The remand judgment was incident, not final. Immediate appeal by a non-participating authority is only possible if it shows irreparable harm or if a long and costly evidentiary procedure would be avoided; neither condition was met.