Key legal question
Whether the federal appeal against the cantonal interim measure was admissible without showing irreparable harm.
Extracted holding
The challenged order was a separate interim measure in a modification proceeding, not a final judgment; as the appellant did not demonstrate an irreparable legal disadvantage, the appeal was inadmissible.
Extracted reasoning
A provisional reduction of maintenance during a modification action is only a measure pending the main proceedings. Such an order is therefore an interlocutory decision under Art. 93 BGG, and the appellant must show irreparable harm, which he failed to do.