Questão jurídica principal
Whether the tax authority decisions were valid enforcement titles for definitive legal opening.
Decisão extraída
Yes. The tax assessment, reminder and default-interest invoice were decisions of a Swiss administrative authority and could support definitive legal opening.
Fundamentação extraída
Under Art. 80 SchKG, definitive legal opening is granted for enforceable judicial or equivalent administrative decisions. The tax office acts as the executive organ of the cantonal finance department; UID/DUNS references do not turn it into a company.