Publications

Prof. Em. Frank Maes presents a complete picture of MARPOL's ANNEX I provisions regarding construction and equipment standards for oil tankers specifically and all ships in general. The chapter is contained within Prof. Henrik Ringbom and Prof. Aldo Chircop's 2025 Commentary to the International Convention for the Prevention of Pollution from Ships, to this day, the only volume globally to comprehensively discuss the MARPOL Convention. Within it, leading international experts such as prof. Em. Frank Maes provide an authoritative analysis of the International Convention for the Prevention of Pollution from Ships 1973/78 and its subsidiary instruments, collectively known as MARPOL.

Protest at sea against deep-sea mining is on the rise. Following demonstrations against the activities of Global Sea Mineral Resources (GSR) in May 2021, Greenpeace interfered with the operations of Nauru Ocean Resources Inc. (NORI) in November 2023. The latter case received more media attention, increased involvement by the International Seabed Authority (ISA) and led to a Dutch court decision on the matter, shedding more light on a very complex legal issue. To what extent can such actions be reconciled with the freedom of the high seas? What is encompassed by ‘peaceful protest’ and do these protest activities against deep-sea mining meet the conditions? What other principles and provisions are relevant in these situations and how are these applied? And in case of infractions, which remedies are available and who is responsible to enforce the applicable rules? On the basis of a comprehensive examination of pertinent legislation, official documents and case law, this chapter will offer an insightful view on these issues and the relevant legal developments.

Under the prevailing consensus that Articles 192 and 194(1)(2) of the United Nations Convention on the Law of the Sea (UNCLOS) constitute due diligence obligations as obligations of conduct, small island states have advocated that in the context of climate change, these provisions should go beyond the due diligence obligations and encompass obligations of result. Some even argue that climate change has transformed the nature of these provisions into obligations of result. This paper, drawing upon the reasoning in the recent advisory opinion and analysing the specific rationales advanced by small island states, maintains that neither the concept of due diligence nor the aforementioned provisions of UNCLOS can be interpreted as containing or transforming into obligations of result.
The study emphasizes the critical distinction between the ‘standard of compliance’ for due diligence obligations and independent obligations of result. It further demonstrates that subsequent procedural obligations under Part XII of UNCLOS, along with other rules such as climate targets established by the Paris Agreement, could contribute to clarifying the ‘stringent standard’ of due diligence in climate change contexts. Finally, this paper focuses on achieving systemic coordination between procedural obligations and due diligence requirements, aiming to clarify existing controversies in this field.