‘(a) the roles and responsibilities of the bodies involved in the execution of the plan, in case of a confirmed or suspected presence of the priority pest concerned, as well as the chain of command and procedures for the co-ordination of actions to be taken by competent authorities, other public authorities, as referred to in Article 4(2) of Regulation (EU) 2017/…, delegated bodies or natural persons involved, as referred to in Article 28(1) of that Regulation, laboratories and professional operators, including the co-ordination with neighbouring Member States and neighbouring third countries, where appropriate;’;