Questão jurídica principal
Whether the federal criminal information ban imposed on the bank had a sufficient legal basis and remained proportionate.
Decisão extraída
The ban could rest on the federal criminal procedure framework in principle, but its continued application was no longer proportionate because it had been left open-ended and had lasted too long.
Fundamentação extraída
The court held that investigative secrecy may justify a temporary information ban for banks facing production orders, especially where collusion risks exist. However, an indefinite and untime-limited ban becomes a serious interference with communication and economic freedom and would require a clear formal statutory basis; in the present case, the duration was disproportionate.