Key legal question
Whether § 155 ZPO governs document production by administrative authorities that are not parties to the civil case.
Extracted holding
§ 155 ZPO applies only when the administrative authority is not itself a party to the civil proceedings.
Extracted reasoning
The revised ZPO newly regulated cooperation between civil justice and administration. Respecting separation of powers, the authority decides on disclosure requests, taking account of official secrecy rules.