Questione giuridica chiave
Whether construction works carried out by inmates on prison buildings qualify as supplies made in the exercise of public authority under Art. 17(4) OTVA.
Decisione estratta
No. The works themselves were construction services attributed to the establishment, not decisions addressed to the recipients of the operations, and they were in part commercially substitutable because outside firms also performed part of the works.
Motivazione estratta
Public authority requires a legally delegated decision-making power exercised toward the addressees of the operation. The relevant works were executed on the prison's initiative and under its responsibility; the power over inmates did not turn the construction activity itself into public authority activity.