In order to facilitate cross-border supervision and investigations of obligations laid down in this Regulation involving several Member States, the Digital Services Coordinators of establishment should be able, through the information sharing system, to invite other Digital Services Coordinators to a joint investigation concerning an alleged infringement of this Regulation. Other Digital Services Coordinators, and other competent authorities, where appropriate, should be able to join the investigation proposed by the Digital Services Coordinator of establishment, unless the latter considers that an excessive number of participating authorities may affect the effectiveness of the investigation taking into account the features of the alleged infringement and the lack of direct effects on the recipients of the service in those Member States. Joint investigation activities may include a variety of actions to be coordinated by the Digital Services Coordinator of establishment in accordance with the availabilities of the participating authorities, such as coordinated data gathering exercises, pooling of resources, task forces, coordinated requests for information or common inspections of premises. All competent authorities participating in a joint investigation should cooperate with the Digital Services Coordinator of establishment, including by exercising their powers of investigation within their territory, in accordance with the applicable national procedures. The joint investigation should be concluded within a given timeframe with a final report taking into account the contribution of all participating competent authorities. Also the Board, where this is requested by at least three Digital Services Coordinators of destination, may recommend to a Digital Services Coordinator of establishment to launch such joint investigation and give indications on its organisation. In order to avoid deadlocks, the Board should be able to refer the matter to the Commission in specific cases, including where the Digital Services Coordinator of establishment refuses to launch the investigation and the Board does not agree with the justification given.
