Key legal question
Whether the appeal against the incidental mutual assistance order was admissible without proof of immediate and irreparable harm.
Extracted holding
The challenged order was incidental and could be appealed only if the appellant showed immediate and irreparable harm under Art. 80e let. b EIMP; this showing was not made.
Extracted reasoning
The appellant relied on access by Belgian tax authorities to already transmitted material, but did not show that the mere presence of Belgian investigators would itself cause irreparable prejudice. The safeguards imposed by the MPC excluded premature disclosure.