If public law is about constituting, maintaining and regulating governance, as some contend, then how does this play out on the international level?", asks Jan Klabbers, in his contribution Global Governance before the ICJ: Re-reading the WHA Opinion. William Schabas deals with the questions surrounding the "Complementarity" issue in respect of referrals to national jurisdictions by the ICTR. These are just two outstanding examples of a variety of topics covered in Volume 13 (2009) of the Max Planck Yearbook of United Nations Law.