The Agreement Relating to the Implementation of Part XI of the United Nations Convention on the Law of the Sea was adopted by UN General Assembly resolution 48/263 on 28 July 1994 and opened for signature the next day. It entered into force on 28 July 1996. The agreement was negotiated to address objections—particularly from the United States, the United Kingdom, Germany, and other industrialized states—to the deep seabed mining regime in Part XI of the 1982 UN Convention on the Law of the Sea (UNCLOS).
Part XI had established the International Seabed Authority (ISA) and the Enterprise to manage mineral resources of the deep seabed as the "common heritage of mankind." Industrialized states viewed the original provisions as overly centralized, hostile to market principles, and burdened by mandatory technology transfer and production limits. Without their participation, UNCLOS risked becoming a treaty regime missing the states with the actual capacity to conduct seabed mining.
The 1994 Agreement effectively rewrote key elements of Part XI without formally amending the Convention. Major changes included:
- Eliminating mandatory technology transfer to the Enterprise and to developing states.
- Restructuring decision-making in the ISA Council to give industrialized states (especially major consumers and investors) effective blocking power through chambered voting.
- Removing production ceilings and subsidies restrictions, applying GATT/WTO-style trade rules instead.
- Deferring the Enterprise's operations until commercial seabed mining becomes viable, and requiring it to operate via joint ventures.
- Cost-saving measures for the ISA, including an evolutionary approach to building institutions.
The Agreement and UNCLOS are to be interpreted and applied as a single instrument; in case of inconsistency, the 1994 Agreement prevails. States may not become party to UNCLOS without also accepting the Agreement. The reform succeeded in bringing in most industrialized states—though the United States, despite signing, has still not ratified UNCLOS as of writing, largely due to US Senate opposition.
Example
In 1996, the United Kingdom ratified UNCLOS together with the 1994 Implementation Agreement, having declined to join the Convention in 1982 due to objections to the original Part XI seabed mining regime.
Frequently asked questions
Major industrialized states refused to ratify UNCLOS because of Part XI's seabed mining provisions. The 1994 Agreement renegotiated those provisions so countries like Germany and the UK could join, securing the Convention's near-universal participation.
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