Regulatory law
Peter has extensive experience in offering strategic advice in regulatory matters and litigating regulatory disputes with both governmental authorities and private parties. His focus is on energy, life sciences, and telecommunications.
Life sciences
Peter’s expertise encompasses a wide range of areas, including market access, pricing and reimbursement, advertising issues, and all aspects of competition law. He is Co-head of the VBB Life sciences group.
Competition law
Peter has been involved in most of the significant cases arising before the Belgian competition authorities and the courts. His expertise in this area extends to merger control, foreign direct investment, cartels, dominant market positions, and procedural issues.
Client, Chambers 2025, Competition“Peter L'Ecluse is dependable and professional.
Representative matters
- Acting for Swiss Transmission System Operator Swissgrid in various pieces of litigation against European Commission before European courts, including dispute regarding electricity balancing platforms (case C121/23 P, Swissgrid v. European Commission, judgment of 13 February 2025).
- Representing three electricity suppliers in seeking European Commission exemption from application of public procurement rules to electricity production and wholesale markets in Belgium pursuant to Article 34 of “Utilities” Directive 2014/25/EU.
- Acting for Haleon in a case alleged to involve category management before the Belgian Competition Authority (decision of 24 April 2025).
- Advising a major market actor regarding competition law aspects of combination therapies of medicinal products (2023-2024).
- Acting for Le Creuset in a distribution case before the Belgian Competition Authority (decision of 13 December 2023).
- Successfully defending a meteorological company in competition cases before the Belgian Competition Authority and civil courts (2018 – 2019).
- Co-arguing landmark competition cases before the European Courts (case C-126/97, Eco Swiss China Time v. Benetton, judgment of 1 June 1999; case T-111/96, ITT Promedia v. European Commission, judgment of 17 July 1998).
Professional
- Admitted to Brussels Bar, 11 May 1991
- Former member of the Bar Council of Dutch language lawyers (Brussels)
Academic
- The George Washington University Law School, Washington DC, Master of Comparative Law, 1987
- University of Leuven (KUL), Master of Laws, 1986
- University of Leuven (KUL), Baccalaureus of Philosophy, 1985
- Member of editorial board of Tijdschrift voor Belgisch Handelsrecht/Revue de droit commercial belge, competition and regulated markets section
- Best Lawyer – Lawyer of the Year for Biotechnology and Life Sciences 2020
- Chambers Europe – Competition: Domestic
- Chambers Europe for Intellectual Property
- Chambers Europe – ‘Leaders In Their Field’ (Competition: Domestic)
- Chambers Europe – ‘Leaders In Their Field’ (Intellectual Property)
- IAM Patent 1000 – The World’s Leading Patent Practitioners
- Managing Intellectual Property – IP Star
- LMG Life Sciences (Europe) – Life Sciences Star
- PLC for Belgium Life Sciences – Regulatory
- PLC for Belgium Life Sciences – Intellectual Property
- PLC for Europe Life Sciences – Competition/Anti-trust
- PLC for Belgian Competition Law/Anti-trust
- PLC for Belgium Dispute Resolution
- International Who’s Who Legal for Life Sciences
- Legal 500 for Intellectual Property
- Legal 500 for Dispute Resolution
- Legal 500 for EU Regulatory – Healthcare and Life Sciences
- European Legal Experts for Intellectual Property
- World IP Review – WIPR Leader
Publications
Widely published on issues involving life sciences and competition law.
Highlights:
- Belgium chapter, Chambers Merger Control Guide (2025) (with Amirsalar Kavoosi and Koen T’Syen)
- Het Brussels hof van beroep spreekt zich uit voor de vertrouwelijkheid van adviezen van bedrijfsjuristen en behandelt ook andere aspecten van elektronische huiszoeking in concurrentiezaken, Tijdschrift voor Belgisch Handelsrecht / Revue de Droit Commercial Belge (2014/3) (with Lieselot Mariën)
- Artikel 101, VWEU – Van openbare orde in Luxemburg maar niet in Brussel? Enkele bedenkingen bij het ‘Haacht’-arrest van het Hof van Cassatie, Tijdschrift voor Belgische Mededinging / Revue de la Concurrence Belge (2010/3) (with Anne Lamote)
- “Akzo” en zijn nakomelingen : geen winnaars, enkel verliezers, Jaarboek Marktpraktijken, Intellectuele Eigendom en Mededinging / Annuaire Pratiques du Marché, Propriété Intellectuelle et Concurrence (2010)
Speaking engagements
Regular conference speaker.
Recent events:
- Evolving EU pharmaceutical supply and shortage obligations (with Axel Korth), EU Pharmaceutical Law Forum, Informa, Brussels, 21 May 2025: speaker
- Recent antitrust healthcare and pharmaceutical developments (with Michelle Clerkin; Enzo Marasà; and Nissim Massarano), American Bar Association webinar, 18 July 2024: speaker
- New obligations and liability for your supply chain (with Evi Mathiou), EU Pharmaceutical Law Forum, Informa, Brussels, 24 May 2023: speaker
- EU – the new Health Technology Assessment Regulation, International Bar Association, 8th annual world life sciences conference, Paris, 4 June 2022: speaker
- Expanding possibilities for unauthorised off-label use of medicines before and after marketing authorisation (with Catherine Longeval), EU Pharmaceutical Law Forum, Informa, Brussels, 19 May 2021: speaker
- Abuse of economic dependency (with Anne-Sophie Meire; Isabel Oest; and Florent Prunet), Competition, Brussels, 12 March 2020: speaker
News & insights
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