Questione giuridica chiave
Whether the company proved tax-exempt export of the diesel motors under the MWSTV
Decisione estratta
No. Tax exemption for export requires a strict customs-based proof, which was not met here.
Motivazione estratta
Under Art. 16 MWSTV, export must be evidenced by customs-stamped documents; other papers, even if plausible or issued by foreign authorities, do not replace the required official customs proof.