Customary International Law in Domestic Courts: Imbroglio, Lord Denning, Stare Decisis

Chapter 13 in: British And Canadian Perspectives On International Law, C.P.M. Waters, ed., Martinus Nijhoff, 2006

14 Pages Posted: 20 May 2007 Last revised: 8 May 2017

See all articles by Stephane Beaulac

Stephane Beaulac

University of Montreal - Faculty of Law; Dentons Canada LLP

Date Written: 2006

Abstract

The paper challenges the proposition that customary international law is automatically a part of the common law in Canada and, by extension, other countries of the Anglo-Saxon legal family. It proposes a more nuanced approach which is better in keeping with the divergent natures of international and national law. The point of focus is a major flaw in the reasoning by Lord Denning in the Trendtex case, which is responsible for the general belief that international customs obey the logics of monism. His Lordship held that dualism could not apply to customs (unlike treaties) because of the doctrine of precedents in common law; monism is the model, otherwise stare decisis would mean that changes in the normativity on the international plane could not be reflected in the domestic law. But nowadays, stare decisis does not mean (assuming it once did) that old precedents will stand in the way of allowing judge-made law to evolve. Arguably, this was already the situation when the Trendtex case was decided in 1977, thus making Lord Denning's ruling fall flat.

Keywords: International Law, Reception Law, Stare Decisis, Lord Denning

JEL Classification: K33, K39

Suggested Citation

Beaulac, Stephane, Customary International Law in Domestic Courts: Imbroglio, Lord Denning, Stare Decisis (2006). Chapter 13 in: British And Canadian Perspectives On International Law, C.P.M. Waters, ed., Martinus Nijhoff, 2006, Available at SSRN: https://ssrn.com/abstract=987306

Stephane Beaulac (Contact Author)

University of Montreal - Faculty of Law ( email )

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