Key legal question
Whether the Federal Court had jurisdiction to review a marital property agreement governed by cantonal law.
Extracted holding
The Federal Court had no jurisdiction, because the disputed agreement was a family-law, specifically matrimonial-property, contract governed exclusively by cantonal law.
Extracted reasoning
Under Art. 76 OR the agreement was not an obligations-law contract but a family-law arrangement. Even if general obligations-law principles apply in Solothurn by cantonal reference, they operate as cantonal law, not federal law. Under Art. 29 O-G, the Federal Court may only hear disputes governed by federal law.