This implementing act is amending Commission Implementing Decision (EU) 2015/1505 as regards the technical specifications and formats relating to trusted lists. This includes a reference to a new version of the standard referenced in Commission Implementing Decision (EU) 2015/1505, in particular concerning newly introduced trust services and qualified trust services, as well as the specifications on the format of signatures or seals to be used by Member States to sign or seal their national trusted lists.