International Economic Law: Water for Money's Sake, I Seminario Latino-Americano de Politicas Publicas em Recursos Hidricos, Brasilia, Brazil 22 September 2004

“Who Owns Your Water? Impacts Of Trade And Foreign Investment Agreements On Water Management”, CGIAR Global Challenge Program On Water And Food, Baseline Conference, Nairobi, Kenya, November 2003

“Reshaping International Investment Agreements”, Royal Institute for International Affairs (Chatham House) Conference, Trade and Sustainable Deevlopment Priorities, Post Doha, London, April 2003.

“International Investment Agreements: Building the New Colonialism”, 97th Annual Meeting, American Society of International Law, April 2003

“Reclaiming Water As A Public Good In The Post Nafta Era: International Trade And Investment Law Considerations”, 3rd World Water Forum Day Of The Americas, Kyoto, Japan, 19 March 2003

"The Right of States to Regulate and International Investment Law", United Nations Conference on Trade and Development, Expert Meeting on the Development Dimensions of Foreign Direct Investment, Geneva, November 2002.

"Who Owns Your Water: Water and Foreign Investors in the Post-NAFTA Context", Hemispheric Forum on Water for the Americas in the 21st Century, Mexico City, October 2002.

"The Corporate v. Public Agenda: Protecting Foreign Investors in the Post-NAFTA Era", Syracuse University, Maxwell School of Citizenship and Public Affairs, October 24, 2002.

"The New Concerns About Investment Agreements", Comments, The United States, The Doha Round and the WTO: Where do we go from here?, American Bar Association Section of International Law and Practice Conference, Washington D.C., September 2002.

Sovereignty, International Law and the Role of Non-State Actors, Closing Plenary, Third Annual International Law Conference: Few Barriers or New Barriers? Directions in International Law and Practice, Canadian Bar Association, Ottawa, Ontario, May 2002.

Overview of Regulatory Expropriation Issues in International Law: NAFTA's Chapter 11, Regulatory Expropriations in International Law Conference, New York University School of Law, New York, N.Y., April 2002.

“Protecting Investor Rights and the Public Good: Assessing NAFTA’s Chapter 11”, Background Paper to the ILSD Tri-National Policy Workshops, Mexico City, March 13; Ottawa, March 18; and Washington D.C., April 11, 2002. With Konrad von Moltke.

"Expropriation and Chapter 11: Just What Do the Cases Say", Investment Law and Sustainable Development: Protecting Investor Rights and Protecting the Public Good Ottawa, Ontario, Canada, March 2002, International Institute for Sustainable Development and the Public Policy Forum.

"Chapter 11 Provisions - Current status and Operations" Commentary, Centre for Trade Policy and Law, NAFTA Chapter 11 Conference, Ottawa, Ontario, Canada, January, 2002.

"Third Party Participation and Intervention in NAFTA Proceedings". Presentation for the Canadian Bar Association, Ontario, International Law Section, at "NAFTA and the Environment: Six years later", Toronto, Ontario, January 2001.

"Privileging Foreign Investors: NAFTA's Chapter 11", Munk Centre for International Studies Conference, "Strengthening Canada's Environmental Community Through International Regime Reform: Twenty-First Century Challenges", Toronto, Ontario, November 2000.

"Assessing the Impact of NAFTA on Environmental Law and Management Processes", First North American Symposium on Understanding the Linkages Between Trade and Environment, North American Commission for Environmental Cooperation, Washington, D.C., October, 2000.

"Trade and the Environment in the Americas", Environmental Grantmakers Association 2000 Retreat, September, 2000, New Paltz, New York.

"The Cartagena Protocol on Biosafety: An Analysis", ASAEN Workshop on International Trade in ASEAN Agricultural and Forest Products and Measures to Align Trade and Environment, June, 2000, Bangkok, Thailand.

International Trade Law and the Environment, Centre for Trade Policy and Law Annual Conference with the Department of Justice, Ottawa, Ontario, March, 2000.

The International Obligation to Effectively Enforce Environmental Laws: Citizen Oversight under the North American Agreement on Environmental Cooperation, Canadian Council on International Law, 1999 Annual Meeting, Ottawa, Ontario, October 1999.

NAFTA and the Environment: Lessons for the Future, 1999 International Law Students Association Conference, "International Law: Approaching the New Millennium", New Orleans, October, 1999.

Rising Tides: International Environmental Law in Canada, Canadian Council on International Law, 1998 Annual Meeting, Ottawa, Ontario, October, 1998.

International Environmental Standards and Enforcement: Changing Sources and Impacts, Insight/Globe and Mail Conferences, Environmental Management and Compliance 95, Toronto, Ontario, November, 1995.

Litigating NAFTA in the Environmental Context: Sanipan c. P.G. du Quebec: The First Canadian Experience, Canadian Bar Association, Recent Developments in Environmental Law and Policy, Ottawa, Ontario, April, 1995.

NAFTA and the North American Agreement on Environmental Cooperation, McGill University, Faculty of Law, Montreal, Quebec, March, 1995.

A Discussion of Principles for International Law and Sustainable Development, Symposium on Greening International Law, New York University Faculty of Law, New York, N.Y., October, 1994.

International Environmental Law and the Canadian Forest Industry, Conference on Environmental Law and Management for the Canadian Forest Industry, The Canadian Institute, Toronto, Ontario, September, 1994.

Emerging Principles of International Law for Sustainable Development, International Symposium on Sustainable Development and International Law, Vienna, Austria, April, 1994.

Aboriginal Rights and International Environmental Law, Canadian Council on International Law, 1993 Annual Meeting, Ottawa, Ontario, October, 1993.

Domestic Legal Ramifications of the United Nations Conference on Environment and Development, Canadian Bar Association, 1992 Annual Meeting, Halifax, Nova Scotia, August, 1992.

Issues Relating to the 1992 Conference on the Environment: The Rio Declaration, American Society of International Law, 1992 Annual Meeting, Washington, D.C., April, 1992.

International Law Aspects of the Development of the Role of The United Nations in Arms Control and Disarmament Verification, Workshop of the United Nations Expert's Group on the Role of the United Nations in Arms Control and Disarmament Verification, Centre for Research in Air and Space Law, McGill University, Montreal, Quebec, July, 1989.

The Role of International Law in Arms Control Verification: Implications for Conventional Arms Control in Europe, Fifth Annual Symposium on Verification, Carleton University, Ottawa, Ontario, March, 1988.