Questão jurídica principal
Whether the Federal Supreme Court could hear the tax-assistance appeal as a matter of principle or as a particularly important case.
Decisão extraída
Yes. The case raised a reviewable procedural question concerning the admissibility of service through an appointed delivery agent in tax assistance group requests.
Fundamentação extraída
The challenge concerned an issue capable of guiding future practice and touching fundamental procedural guarantees, so the restrictive admissibility threshold for international tax assistance was met.