Article 8 — Requests for investigative measures

1. At the request and on behalf of an applicant enforcement authority, the requested enforcement authority shall take investigative measures, in accordance with the powers set out in Article 6(1), first subparagraph, points (a), (b) and (c), of Directive (EU) 2019/633 and in accordance with its national law, in order to determine whether an unfair trading practice with a cross-border dimension has occurred or is occurring. 2. Where a requested enforcement authority exercises the powers set out in Article 6(1), first subparagraph, points (a), (b) and (c), of Directive (EU) 2019/633 at the request and on behalf of an applicant enforcement authority, officials and other accompanying persons authorised or appointed by the applicant enforcement authority shall be permitted to accompany and assist the requested enforcement authority in the exercise of its powers, under the supervision of its officials and provided that the applicant enforcement authority has informed the requested enforcement authority in advance of its wish to participate. 3. The requested enforcement authority shall inform the applicant enforcement authority without delay about the steps and measures that it has taken, or intends to take, under paragraph 1.