Key legal question
Whether the public law appeal was admissible despite challenging the application of federal law in a civil case also open to reform appeal.
Extracted holding
The challenge was largely inadmissible because alleged arbitrary application of federal law had to be raised in the parallel reform appeal, given the principle of subsidiarity.
Extracted reasoning
Public law appeal is subsidiary; when a reform appeal is available in a civil case above the statutory value threshold, complaints about federal-law application cannot be brought by public law appeal.