Key legal question
Whether the appeal against the Liechtenstein lower-court judgment was admissible and limited to legal questions.
Extracted holding
Only the judgment of the Liechtenstein Administrative Court was challengeable; the complaint against the original tax administration decision was inadmissible.
Extracted reasoning
Under the treaty and Liechtenstein VAT Act, the Federal Supreme Court may review only final Liechtenstein decisions on questions of law, not facts or the first administrative decision.