Article 3(1) authorities -

(a) may reply to Europol to duly justified requests related to bank account information made by Europol on a case-by-case basis within the limits of Europol's responsibilities and for the performance of Europol's tasks, and

(b) shall ensure that replies to requests under paragraph (a) are made in accordance with Regulation (EU) 2016/794 electronically through -

(i) the information exchange network commonly known as SIENA, or its successor, in the language applicable to SIENA, or

(ii) where applicable, to the computer network commonly known as FIU.net, or its successor.