The Hague Conference Permanent Bureau has published last month (April 2019) a new preliminary document in anticipation of the 22nd Diplomatic Session from 18 June to 2 July 2019 (Judgments Convention): Prel. Doc. No 7 of April 2019 – Note on “common courts” in Article 4(5), (6) of the 2018 draft Convention. It may be accessed here