SCGA Team: Christian J. Tams

Christian J. Tams

Chair, International Law, University of Glasgow

Christian J. Tams is Professor of International Law at the University of Glasgow, where he directs the Glasgow Centre for International Law and Security (GCILS). He studied and worked in Germany before coming to Scotland in 2008.

He is an expert on questions of in international law and has e.g. published on the legal rules governing recourse to military force, on the role of international courts, and on investment protection. In addition to his academic work, Christian  regularly advises States, individuals and companies in disputes before international courts. He sits on the Board of the European Society of International Law and of the editorial board of the European Journal of International Law.

He is a long-suffering supporter of a once-mighty football club, the Hamburger Sport-Verein.

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Press, Clips, Interviews

“The major football associations exclude Russia. But do they even have the right to punish teams and players for the actions of the state and its political leadership in violation of international law?”. 

GCILS Director, Professor Christian J Tams signed a declaration, sponsored by former Prime Minister of the United Kingdom, Gordon Brown, and his wife, Sarah Brown, calling for the creation of a special tribunal for the punishment of the crime of aggression against Ukraine.

Statement by Members of the International Law Association Committee on the Use of Force.

Statement by the President and the Board of the European Society of International Law on the Russian Aggression against Ukraine.

To mark the 20th anniversary of the most widely used document in international law, we are publishing a special new Working Paper, ’The ILC Articles at 20′, bringing together contributions to an @ejiltalk symposium published in August:


Schill, S. W., Tams, C. J. and Hofmann, R. (2018) Oceans and space: new frontiers in investment protection? Journal of World Investment and Trade, 19(5-6), pp. 765-774. (doi: 10.1163/22119000-12340119)

Tams, C. (2018) Legacy of the League of Nations. Soochow Law Journal, 15(2), pp. 217-223.

Tams, C. J. (2018) Three questions about “informal regulation”. AJIL Unbound, 112, pp. 108-112. (doi: 10.1017/aju.2018.40)

Tams, C. (2017) Embracing the uncertainty of old: armed attacks by non-state actors prior to 9/11. Zeitschrift für ausländisches öffentliches Recht und Völkerrecht, 77,

Tams, C. J. (2016) State succession to investment treaties: mapping the issues. ICSID Review: Foreign Investment Law Journal, 31(2), pp. 314-343. (doi: 10.1093/icsidreview/siw006)

Tams, C. J. (2015) EJIL editor’s choice of books 2015. European Journal of International Law, 26(4), pp. 1033-1035. (doi: 10.1093/ejil/chv069)

Tams, C. J. (2015) Meta-custom and the court: a study in judicial law-making. Law and Practice of International Courts and Tribunals, 14(1), pp. 51-79. (doi: 10.1163/15718034-12341285)

Tams, C. J. (2014) Editor’s book choices 2014. European Journal of International Law: Talk! [blog],

Kress, C. and Tams, C. J. (2014) Wider die normative Kraft des Faktischen: Die Krim-Krise aus völkerrechtlicher Sicht. Internationale Politik(3), pp. 16-19.

Tams, C. J. (2014) Procedural aspects of investor-state dispute settlement: the emergence of a European approach? Journal of World Investment and Trade, 15(3-4), pp. 585-611. (doi: 10.1163/22119000-01504012)


O’Connell, M. E., Tams, C. J. and Tladi, D. (2019) Self-Defence against Non-State Actors. Series: Max Planck trialogues. Cambridge University Press: Cambridge. (doi:10.1017/9781108120173)

Tams, C. J. , Berster, L. and Schiffbauer, B. (2014) Convention on the Prevention and Punishment of the Crime of Genocide. Beck: München. ISBN 978406603174

Tams, C.J. (2010) Enforcing Obligations Erga Omnes in International Law. Revised edition. Series: Cambridge studies in international and comparative law (44). Cambridge University Press: Cambridge. ISBN 9780521128896

Behring, J., Braun, T.R., Lorz, R.A., Tams, C. , Schill, S. and Tietje, C. (2009) General Public International Law and International Investment Law: A Research Sketch on Selected Issues. Beiträge zum Transnationalen Wirtschaftsrecht. International Law Association German Branch – Sub-Committee on Investment Law, Halle, 2009: Halle.

Tams, C.J. (2006) An Appealing Option?: The Debate about an ICSID Appellate Structure. Series: Beiträge zum transnationalen Wirtschaftsrecht (57). Inst. für Wirtschaftsrecht: Halle, Germany. ISBN 9783860108437

Social feed

We will discuss tomorrow 2pm CET the Rockhopper v Italy ICSID award. Link below. The oil company was awarded 185 million EUR because it was denied a licence to drill oil just off the coastline, after the Italian parliament banned such concessions. Plenty to talk about - join us!…

I am very excited to talk about Rockhopper v Italy Award tomorrow, with @anil_yv @MarzalToni as well as many others @AnzizuDe @BJVerbeek @vdbam . Spoiler abt my take: the award is perverse. The devil is not only in the details. Join us, link to register here 👇…

Die Urteilsgründe des AG Flensburg zu Klimakrise als rechtfertigender Notstand sind da. Ganz unabhängig davon, wie man zum Ergebnis steht - es ist ein faszinierendes Dokument, das zeigt, wie sehr die Klimakrise an das Fundament des Rechts geht. Hier nur ein paar Ausschnitte. 1/11

You can now watch a recording of last week's event on plans for a special tribunal for the punishment of the crime of aggression against Ukraine on our YouTube Channel: (1/3)

As @NASA_Orion continues its journey home, we're also celebrating the 50th anniversary of the iconic "Blue Marble" photo of Earth, taken on Dec. 7, 1972 by the crew of Apollo 17.

Get the full-size image:

Timely and important discussion of “International Responses to Russian Aggression in Ukraine” at Scotland House in Brussels. ⁦@scga_scot⁩ is proud to co-sponsor the event with the ⁦@epc_eu⁩.

#BVerfG Constitutional complaints challenging the Act Ratifying the EU Own Resources Decision (‘EU Recovery Package’) unsuccessful

#BVerfG Verfassungsbeschwerden gegen das Eigenmittelbeschluss-Ratifizierungsgesetz („EU-Wiederaufbaufonds – NGEU“) erfolglos

In this new post, Khush Bhachawat focuses on the standing of non-injured states before the ICJ in relation to erga omnes obligations as decided by the Court in The Gambia v Myanmar.… via @InternationalLawBlog