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Professional Standards Committee

The Professional Standards Advisory Committee provides advice and guidance to members on the Code of Conduct for Counsel and can offer advisory opinions when requested.

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Documents

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Summary of ICC Disciplinary Decisions

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Advisory Opinion - Factual and Legal Implications of Admission to the ICC List of Assistants to Counsel - 3 February 2026

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Current members
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AURÉLIE BERTHET

Admitted to the Paris Bar since 2003 and registered in England and Wales since 2015, Aurélie Berthet is also a Mediator, listed with several Courts of Appeal in France. A dual French-British national, she practices both locally and internationally, with a strong specialization in criminal law, asylum law, and international humanitarian law. With degrees in science, law, and mediation, and over 20 years of field experience, Aurélie Berthet teaches the fundamentals of the legal profession in law schools, having previously lectured in criminal law at the university level. A former Member of the National Bar Council (CNB) and several other representative bodies of the legal profession in France, Honorary President of the Paris Young Lawyers’ Union (UJA), and Honorary Member of the National Federation of Young Lawyers’ Unions (FNUJA), Aurélie Berthet approaches all entrusted tasks with passion and dedication.

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JENS DIECKMANN

Jens Dieckmann is a German Lawyer. He is Founding and Senior Partner of Becher&Dieckmann in Bonn (Germany) as well as Associate Member of Chamber 9BR International (London, UK). Jens Dieckmann can offer clients more than 27 years of high level international litigation and negotiation practice in high profile cases. He has worked in and lead international teams of lawyers at various international criminal tribunals. In addition, he has a varied national and international practice as Counsel in International Human Rights Law as well as Asylum and Immigration Law. He provides consultancy to Governments and NGOs in the field of International Criminal Law and Asylum Law. He is appointed to the Expert Commission on Asylum by the Federal Board of Amnesty International, Germany. Since 2006, he is an elected member of the Board of ADC-ICT. In 2015/16, he was a member of the Drafters Committee and the Interim Board of the ICCBA. He served the ICCBA inter alia as Vice President for Victims (2017/2018 and 2018/2019) and was Chair of the Victims Committee in 2017/2018 and 2018/2019. He was member of the Executive Council 2016-2019 and of the Victims Committee 2023/2024. Since 2011 he is CLR, Associate Counsel, for Victims in the ICC Banda Case.

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LYMA NGUYEN

www.lymanguyen.com - Lyma Nguyen is an Australian barrister who also practises in international criminal law, transnational crimes and human rights. In 2018, she was appointed List Counsel before the ICC and has served on the ICCBA Legal Advisory Committee (2022) and Amicus Committee (2023). Domestically, Lyma has chaired disciplinary inquiries including the Local Government Disciplinary Committee and Teachers Registration Board, which govern standards of fitness and adherence to the relevant Codes of Conduct governing those professions. Lyma edited the College of Law Practice Papers on Professional Conduct and Discipline; The Lawyer and Client Relationship; A Lawyer's Relationship with the Court and A Lawyer's Relationship with the Public (2016). In 2020, Lyma won the 40 Under 40 Most Influential Asian Australians Leadership Awards and was the youngest of 45 “Trailblazing Women Australian Lawyers” whose oral history is archived in Australia’s National Library (2014), recognised for her service as  International Civil Party Counsel at the Extraordinary Chambers in the Courts of Cambodia, where she represented the ethnic Vietnamese minority victims in the tribunal’s historic genocide case. In 2024, as a prosecutor before a People’s Tribunal, The Court of the Citizens of the World, Lyma presented an Indictment charging President Xi Jinping for crimes against humanity against the Tibetan civilian population, in an unprecedented Confirmation Hearing in which charges of genocide of the Uyghur minority population in Xinjiang were also confirmed. Lyma is as an Advisor to the United Nations Association Australia, NT Division and the Justice and Accountability Network Australia (PacificJust). She served as inaugural President of the Asian Australian Lawyers Association, NT Branch (2021 – 2024); Law and Justice Civilian Expert on the Australian Civilian Corps (2012) and Director on the Board of Australian Volunteers International (2014 – 2023).

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INGO KLAUS WAMSER

Ingo Klaus Wamser is admitted to the German bar since 2005 and was awarded the title of a Certified Criminal Law Specialist by the Munich bar in 2009. He is working on criminal law, cross-border and international criminal law and extradition cases before national courts and was appointed as duty counsel before the International Criminal Court. He is a specialist in disciplinary and contempt cases, served as Alternate Commissioner at the ICC, co-drafted the Code of Conduct for Counsel at the KSC, serves as disciplinary judge in Germany in his third term and in disciplinary related positions in international bar associations. As a founding member of the ICCBA Ingo contributed to the Membership and Professional Standards Advisory Committees in previous years. He is co-author of a commentary on the German Federal Lawyer’s Act, published on international and national criminal law topics and was lector for international law at an Austrian state university. 

Oude Waalsdorperweg 10, 2597 AK, The Hague, The Netherlands
info@iccba-abcpi.org 

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