(46)In order to facilitate the provision of services by third-country external reviewers to issuers of European Green Bonds, an endorsement regime should be laid down, allowing, under certain conditions, registered external reviewers established in the Union to endorse services provided by a third-country external reviewer. An external reviewer that has endorsed services provided by a third-country external reviewer should be fully responsible for such endorsed services and for ensuring that such third-country external reviewer complies with this Regulation.