A new section covers international environmental law and the law of the sea. According to its tradition, the CYIL in Volume 7 also covers certain aspects of international investment law and arbitration, such as non-precluded measures, third party funding of arbitration costs and developments aimed at the permanent investment court. The Yearbook also covers the Czech practice of international law, in particular the Czech cases before the European Court of Human Rights. Moreover, the publication presents, as usual, topical information on the work of the UN International Law Commission in 2016, the list of treaties ratified by the Czech Republic, book reviews and a survey of Czech international law bibliography. As usual, the authors of this publication come both from Czech and foreign institutions, from academia and legal practice. More than in previous years, this volume includes contributions of foreign professors and researchers, coming from or teaching in Austria, Finland, France, Lithuania, India, Slovakia and Slovenia. As to the Czech institutions involved, these include Charles University in Prague, Palacký University in Olomouc, West-Bohemian University in Plzeň, the Institute of Law of the Czech Academy of Sciences, the University of Economics in Prague, the Ministry of Foreign Affairs, the Ministry of Industry and Trade and the Ministry of Justice, as well as some private law firms. While keeping high academic standards, the Yearbook wants to be open for dialogue of scholars and practitioners of international law. This publication appears thanks to the financial subsidy to the Czech Society of International Law from the Council of Scientific Societies of the Czech Republic. We are also grateful for generous financial support from the Prague branch of the law firm Weil, Gotshal and Manges. We wish that this volume of the Czech Yearbook also find many readers and we are looking forward to new authors and new contributions for the next volume. We are also grateful for any comments and suggestions on how to improve the quality of this journal.