Questão jurídica principal
Whether the appellant had standing to challenge the mutual assistance measures for all accounts, including account no. 6.
Decisão extraída
He had standing only for accounts 1 to 5, where he was holder or co-holder; he could not challenge account 6 because he was only beneficial owner.
Fundamentação extraída
Standing follows the opposition standing under the bilateral treaty; only persons personally and directly affected may contest the measures.