Introduction
The International Seabed Authority (ISA) is an international organisation established under Part XI of the United Nations Convention on the Law of the Sea (UNCLOS) to organise and control activities in the Area.
- Introduction
- Meaning of International Seabed Authority
- Legal Basis
- Article 156 – Establishment
- Article 157 – Nature of the Authority
- Headquarters
- Membership
- Relationship with the Area
- Common Heritage of Mankind
- Article 137 – No Appropriation
- Main Functions of the ISA
- The ISA Is Not a Mining Company
- Principal Organs
- The Assembly
- Functions of the Assembly
- Council
- Functions of the Council
- Assembly vs Council
- Legal and Technical Commission
- Functions of the Legal and Technical Commission
- Finance Committee
- Secretariat
- Secretary-General
- Enterprise
- 1994 Implementation Agreement
- Activities in the Area
- Mineral Resources
- Prospecting
- Exploration
- Exploitation
- Plans of Work
- Contracts
- Sponsorship
- State Responsibility
- Sponsoring State Due Diligence
- 2011 Advisory Opinion
- Environmental Protection
- Environmental Concerns
- Environmental Impact Assessment
- Precautionary Approach
- Article 140 – Benefit of Mankind
- Benefit Sharing
- Developing States
- Technology Transfer
- Marine Scientific Research
- Rights of Coastal States
- Archaeological and Historical Objects
- Peaceful Purposes
- Privileges and Immunities
- Legal Personality
- ISA and International Seabed Area
- ISA and High Seas
- ISA and Continental Shelf
- ISA and Extended Continental Shelf
- ISA and EEZ
- ISA vs ITLOS
- ISA vs CLCS
- ISA vs IMO
- Importance of the ISA
- Challenges Facing the ISA
- Environmental Protection vs Exploitation
- Common Examination Mistakes
- Quick Revision
- One-Line Memory Trick
- Final ISA Formula
- Conclusion
The Area means the seabed, ocean floor and subsoil beyond the limits of national jurisdiction.
The ISA is therefore central to the international legal regime governing:
- exploration of deep seabed minerals;
- exploitation of those resources;
- environmental protection;
- benefit sharing;
- participation of developing States.
Its legal framework is primarily found in UNCLOS Articles 156–185, together with Annex III, Annex IV, and the 1994 Agreement relating to the Implementation of Part XI of UNCLOS.
Core Formula
The Area
↓
Common Heritage of Mankind
↓
International Seabed Authority
↓
Organises + Controls Activities
↓
Prospecting → Exploration → Exploitation
↓
Benefit of Mankind + Environmental Protection
Meaning of International Seabed Authority
The ISA is the international organisation through which States Parties organise and control activities in the Area.
It does not exercise sovereignty over the Area like a State exercises sovereignty over its territory.
Instead, it performs regulatory, administrative and supervisory functions under UNCLOS.
Important Distinction
ISA → International Administration and Regulation
State → Sovereignty over its national territory
Therefore:
ISA ≠ Sovereign Owner of the Seabed
Legal Basis
The principal provisions are:
- Article 156 → Establishment of the Authority
- Article 157 → Nature and fundamental principle
- Article 158 → Organs of the Authority
- Article 159 → Assembly
- Article 160 → Powers and functions of the Assembly
- Article 161 → Council
- Article 162 → Powers and functions of the Council
- Article 163 → Council organs
- Article 164 → Economic Planning Commission
- Article 165 → Legal and Technical Commission
- Article 166 → Secretariat
- Article 167 → Secretariat
- Article 168 → Secretary-General
- Article 169 → Staff
- Article 170 → Enterprise
- Articles 171–175 → Financial provisions
- Articles 176–185 → Legal status, privileges, immunities and related matters
Article 156 – Establishment
Article 156 UNCLOS
An international organisation called the:
International Seabed Authority
is established to organise and control activities in the Area, particularly with a view to administering the resources of the Area.
All States Parties to UNCLOS are ipso facto members of the Authority.
Article 157 – Nature of the Authority
The ISA is the organisation through which States Parties organise and control activities in the Area.
Its authority is therefore based on:
UNCLOS
and applies specifically to:
Activities in the Area
It is not a general authority over all oceans.
Headquarters
The headquarters of the ISA are located in:
Kingston, Jamaica
Membership
States that are parties to UNCLOS become members of the ISA under Article 156.
The ISA therefore has a broad international membership corresponding to participation in the UNCLOS system.
Relationship with the Area
The relationship can be understood as:
Area
→ Seabed beyond national jurisdiction
↓
Common Heritage of Mankind
↓
ISA
→ Organises and controls activities
The ISA therefore gives institutional form to the Common Heritage of Mankind principle.
Common Heritage of Mankind
The ISA cannot be understood separately from Article 136 UNCLOS.
Article 136 provides that:
The Area and its resources are the common heritage of mankind.
This means that the ISA’s regulatory role is intended to ensure that the resources of the Area are not appropriated unilaterally.
Article 137 – No Appropriation
No State may claim or exercise sovereignty or sovereign rights over any part of the Area or its resources.
Similarly, no State or natural or juridical person may appropriate any part of the Area.
Therefore:
ISA Regulation → Prevents Unilateral Appropriation
Main Functions of the ISA
The ISA performs several major functions.
Organising Activities
It organises activities concerning mineral resources in the Area.
Controlling Activities
It controls activities through:
- regulations;
- contracts;
- plans of work;
- compliance mechanisms.
Approving Exploration
It considers and approves plans of work for exploration.
Regulating Exploitation
It is responsible for developing and implementing the regulatory framework for exploitation.
Environmental Protection
It establishes rules and procedures for protecting the marine environment.
Benefit Sharing
It develops mechanisms concerning the equitable sharing of financial and other economic benefits derived from activities in the Area.
The ISA Is Not a Mining Company
The ISA primarily performs an:
International Regulatory Function
It should not be confused with a commercial mining company.
The system does, however, include the Enterprise, which was envisaged under UNCLOS as an operational arm for activities in the Area.
Principal Organs
Article 158
The principal organs of the ISA are:
- Assembly
- Council
- Secretariat
The Enterprise is also established as an organ under Article 170.
The ISA also has specialised bodies, including the:
- Legal and Technical Commission;
- Finance Committee.
The Assembly
Article 159
The Assembly consists of all members of the Authority.
It is the principal policy-making body.
One Member, One Vote
As a general principle, each member has:
One vote
The Assembly therefore provides the broad representative forum within the ISA.
Functions of the Assembly
Article 160
The Assembly has broad powers and functions, including:
- establishing general policies;
- considering reports;
- approving the budget;
- electing members of certain organs;
- approving rules and regulations in accordance with UNCLOS;
- considering matters within the competence of the Authority.
It also exercises important oversight over the Council.
Council
Article 161
The Council is the executive organ of the ISA.
It consists of members elected by the Assembly according to the categories and requirements established by UNCLOS.
The composition is designed to reflect different interests, including:
- major consumers/importers of minerals;
- major investors;
- major exporters of land-based minerals;
- developing States;
- geographical representation.
Functions of the Council
Article 162
The Council performs important executive and regulatory functions.
It may:
- supervise and coordinate implementation of the Area regime;
- approve plans of work;
- adopt rules and regulations within its competence;
- oversee activities in the Area;
- make recommendations to the Assembly;
- consider applications and contracts;
- monitor compliance.
Assembly vs Council
| Assembly | Council |
|---|---|
| All members | Limited elected membership |
| Principal policy-making organ | Executive organ |
| Broad policy | Regulatory/executive functions |
| Approves budget | Supervises implementation |
| Oversees Council | Deals with plans of work |
Memory Rule
Assembly → Policy
Council → Execution
Legal and Technical Commission
Article 165
The Legal and Technical Commission (LTC) is an important subsidiary organ of the Council.
It consists of experts elected on the basis of appropriate qualifications.
Its work covers technical and legal matters relating to:
- activities in the Area;
- plans of work;
- exploration;
- exploitation;
- environmental protection;
- compliance.
Functions of the Legal and Technical Commission
The Commission may:
- review plans of work;
- make recommendations to the Council;
- develop technical standards;
- advise on environmental matters;
- assess scientific and technical information;
- monitor compliance-related matters.
Memory Rule
LTC → Legal + Technical Expertise
Finance Committee
The Finance Committee deals with financial matters of the Authority.
It is particularly important for:
- budgets;
- financial rules;
- revenue;
- expenditure;
- financial arrangements concerning activities in the Area.
Secretariat
The Secretariat performs the administrative functions of the Authority.
It supports:
- Assembly;
- Council;
- commissions;
- meetings;
- documentation;
- contracts;
- administrative operations.
Secretary-General
The Secretary-General is the chief administrative officer of the ISA.
The Secretary-General is responsible for:
- administration;
- official documentation;
- implementation of decisions;
- communication;
- management of Secretariat functions.
Enterprise
Article 170
The Enterprise is an organ of the ISA.
It was designed to conduct activities in the Area directly, as well as through joint arrangements where appropriate.
Its creation reflects the idea that developing States and the international community should not be excluded from actual participation in deep seabed activities.
The practical operation of the Enterprise has been substantially affected by the 1994 Implementation Agreement.
1994 Implementation Agreement
The original Part XI system was controversial.
Developed States raised concerns about:
- compulsory technology transfer;
- production limitations;
- financial obligations;
- decision-making;
- the Enterprise;
- economic consequences for existing mineral producers.
The 1994 Implementation Agreement modified important aspects of Part XI.
Therefore, the modern ISA framework should be studied as:
UNCLOS Part XI + 1994 Implementation Agreement
Activities in the Area
The ISA’s principal regulatory role concerns:
Prospecting
↓
Exploration
↓
Exploitation
of mineral resources.
Mineral Resources
The resources of the Area include mineral resources found in situ.
Important deep seabed minerals include:
- polymetallic nodules;
- polymetallic sulphides;
- cobalt-rich ferromanganese crusts.
Prospecting
Prospecting involves searching for and identifying mineral resources.
It does not create ownership over the resources.
Exploration
Exploration involves detailed scientific and technical investigation of deposits.
It may include:
- geological surveys;
- sampling;
- environmental baseline studies;
- resource assessment.
Exploitation
Exploitation involves the actual recovery of mineral resources.
The exploitation regime requires a detailed regulatory framework concerning:
- commercial recovery;
- environmental protection;
- financial terms;
- compliance;
- benefit sharing.
Plans of Work
Activities in the Area are carried out pursuant to approved:
Plans of Work
A plan of work provides the framework within which a contractor conducts activities.
The ISA considers matters such as:
- technical capability;
- financial capacity;
- environmental protection;
- compliance;
- proposed work programme.
Contracts
The ISA enters into contracts with qualified entities for activities in the Area.
The contractual system allows the Authority to supervise activities rather than allowing unilateral exploitation.
Sponsorship
A contractor may operate under the sponsorship of a State Party.
The sponsoring State has important obligations to ensure compliance with UNCLOS and applicable ISA rules.
State Responsibility
Article 139
States Parties have responsibility to ensure that activities in the Area conducted by:
- States;
- State entities;
- nationals;
- juridical persons under their jurisdiction or control
are carried out consistently with UNCLOS.
Sponsoring State Due Diligence
The sponsoring State must exercise:
Due diligence
in supervising sponsored activities.
It is not automatically liable for every act of a contractor.
2011 Advisory Opinion
Responsibilities and Obligations of States Sponsoring Persons and Entities with Respect to Activities in the Area
The Seabed Disputes Chamber of ITLOS issued its advisory opinion in 2011.
It is a leading authority on:
- sponsoring-State responsibility;
- due diligence;
- environmental protection;
- precaution;
- compliance with ISA rules.
Examination Formula
Sponsorship → Due Diligence → Environmental Protection
Environmental Protection
One of the most important modern functions of the ISA is environmental protection.
Article 145
The Authority must adopt appropriate rules, regulations and procedures to ensure effective protection of the marine environment from harmful effects arising from activities in the Area.
Environmental Concerns
Deep seabed mining may cause:
- habitat destruction;
- sediment plumes;
- biodiversity loss;
- disturbance of deep-sea ecosystems;
- disruption of ecological processes.
The ISA’s regulatory system therefore incorporates environmental requirements.
Environmental Impact Assessment
Environmental assessment is important before and during activities.
Relevant matters include:
- baseline environmental studies;
- monitoring;
- impact assessment;
- mitigation;
- emergency measures;
- reporting.
Precautionary Approach
Because scientific understanding of deep-sea ecosystems remains incomplete, environmental regulation increasingly gives importance to:
Precaution
The basic idea is that scientific uncertainty should not automatically justify unrestricted exploitation where serious environmental harm may occur.
Article 140 – Benefit of Mankind
The ISA’s activities must be directed toward the:
Benefit of mankind as a whole
This includes:
- present generations;
- future generations;
- developing States;
- developed States.
Benefit Sharing
Financial and other economic benefits arising from activities in the Area are to be shared equitably according to the applicable international regime.
This is one of the defining features of the CHM principle.
Developing States
Article 148
Developing States receive special consideration concerning activities in the Area.
The system seeks to facilitate:
- participation;
- training;
- technological development;
- economic opportunities.
Technology Transfer
Article 144
States and competent international organisations are expected to cooperate in promoting:
Transfer of technology and scientific knowledge
relating to activities in the Area.
The original provisions were modified by the 1994 Implementation Agreement.
Marine Scientific Research
Article 143
Scientific research in the Area is to be conducted:
- for peaceful purposes;
- for the benefit of mankind as a whole.
The ISA framework encourages international scientific cooperation.
Rights of Coastal States
Article 142
Activities in the Area must respect the rights and legitimate interests of coastal States where those activities may affect:
- coastal resources;
- maritime activities;
- other legitimate interests.
The ISA therefore does not operate without regard to neighbouring coastal States.
Archaeological and Historical Objects
Article 149
Archaeological and historical objects found in the Area are to be preserved or disposed of for the benefit of mankind as a whole.
Particular regard is given to the rights and interests of States with relevant cultural, historical or archaeological connections.
Peaceful Purposes
Article 141
The Area is open to use exclusively for:
Peaceful purposes
This reinforces the broader peaceful-use principle of the law of the sea.
Privileges and Immunities
The ISA has international legal status and enjoys privileges and immunities necessary for the exercise of its functions.
Relevant UNCLOS provisions and agreements provide protection for:
- property;
- officials;
- archives;
- communications;
- premises.
The purpose is to ensure the independent functioning of the organisation.
Legal Personality
The ISA possesses the legal capacity necessary for the exercise of its functions.
This allows it to:
- enter into contracts;
- acquire and dispose of property;
- participate in legal proceedings;
- perform international functions.
Its legal personality is functional, not equivalent to the sovereignty of a State.
ISA and International Seabed Area
The relationship can be represented as:
The Area
↓
Common Heritage
↓
ISA
↓
Regulation
↓
Contractors
↓
Exploration / Exploitation
↓
Benefits + Environmental Protection
ISA and High Seas
The ISA does not regulate all high-seas activities.
Its jurisdiction is specifically connected with:
Activities in the Area
Therefore:
High Seas
→ Part VII
The Area
→ Part XI + ISA
ISA and Continental Shelf
The ISA does not regulate a coastal State’s continental shelf merely because the shelf contains mineral resources.
Continental Shelf
→ Coastal-State sovereign rights
Area
→ ISA international regime
This distinction is crucial.
ISA and Extended Continental Shelf
A coastal State may possess a continental shelf extending beyond 200 nautical miles.
That seabed remains under the coastal State’s jurisdiction.
The ISA becomes relevant only to seabed areas beyond the limits of national jurisdiction.
Therefore:
Beyond 200 nm ≠ Automatically ISA Jurisdiction
ISA and EEZ
The ISA does not administer mineral resources in a State’s EEZ.
The coastal State exercises sovereign rights over resources in its EEZ under Part V.
EEZ
Coastal State
Area
ISA / International Regime
ISA vs ITLOS
These institutions have different functions.
International Seabed Authority
Regulates and administers activities in the Area.
ITLOS
Judicial body dealing with disputes under UNCLOS.
Seabed Disputes Chamber
Has specialised jurisdiction relating to activities in the Area.
ISA vs CLCS
These are also different.
ISA
Deals with:
Activities in the Area
CLCS
Deals with:
Scientific and technical recommendations concerning outer limits of the continental shelf beyond 200 nm
The CLCS does not regulate deep seabed mining.
ISA vs IMO
ISA
→ Deep seabed resources in the Area
IMO
→ International shipping, maritime safety, pollution and related matters
They therefore operate in different fields.
Importance of the ISA
The ISA is important because it transforms the Common Heritage of Mankind principle from a general legal idea into an:
Institutional Regulatory System
Without an institution such as the ISA, the prohibition on unilateral appropriation would be much more difficult to implement.
Challenges Facing the ISA
The ISA faces several major challenges.
Environmental Uncertainty
The ecological consequences of deep seabed mining are not fully understood.
Mining Regulations
Developing detailed exploitation regulations is legally and technically complex.
Benefit Sharing
Determining how financial benefits should be distributed fairly is difficult.
Developing-State Participation
Ensuring meaningful participation requires:
- technology;
- finance;
- capacity building;
- training.
Commercial Interests
Deep seabed minerals have potential economic value, creating tension between:
- resource development;
- environmental protection.
Scientific Knowledge
Regulation must operate despite gaps in knowledge concerning deep-sea ecosystems.

Environmental Protection vs Exploitation
The central policy tension is:
Resource Development
vs
Marine Environmental Protection
The ISA must regulate activities in a way that respects both the resource mandate and the environmental obligations of UNCLOS.
Common Examination Mistakes
Mistake 1: ISA Owns the Area
Incorrect.
The ISA regulates and administers activities; it does not exercise territorial sovereignty.
Mistake 2: ISA Is a UN Organ
Incorrect.
The ISA is an international organisation established under UNCLOS. It is not one of the six principal organs of the United Nations.
Mistake 3: ISA Regulates the Entire Ocean
Incorrect.
Its jurisdiction is principally connected with activities in the Area.
Mistake 4: ISA Controls Coastal-State Continental Shelves
Incorrect.
Coastal States have sovereign rights over their continental shelves.
Mistake 5: Everything Beyond 200 nm Is Under ISA
Incorrect.
An extended continental shelf can extend beyond 200 nm.
Mistake 6: ISA Is a Commercial Mining Company
Incorrect.
Its principal function is international organisation, regulation and control.
Mistake 7: Any Company Can Mine the Area
Incorrect.
Activities must operate within the UNCLOS/ISA framework.
Mistake 8: Discovery Creates Ownership
Incorrect.
Article 137 prohibits appropriation.
Mistake 9: Sponsoring State Is Automatically Liable for Every Contractor Act
Incorrect.
The 2011 Advisory Opinion focuses on due diligence obligations.
Mistake 10: Common Heritage Means Free Exploitation
Incorrect.
It means international regulation and benefit for mankind as a whole.
Mistake 11: ISA and CLCS Perform the Same Function
Incorrect.
ISA regulates activities in the Area; CLCS deals with the scientific and technical aspects of outer continental-shelf limits.
Quick Revision
- ISA → International Seabed Authority.
- Established under Part XI UNCLOS.
- Main provisions → Articles 156–185.
- Headquarters → Kingston, Jamaica.
- Article 156 → Establishment.
- Article 157 → Nature and functions.
- Article 158 → Organs.
- Article 159 → Assembly.
- Article 160 → Assembly functions.
- Article 161 → Council.
- Article 162 → Council functions.
- Article 165 → Legal and Technical Commission.
- Article 166 → Secretariat.
- Article 168 → Secretary-General.
- Article 170 → Enterprise.
- ISA organises and controls activities in the Area.
- Area → seabed, ocean floor and subsoil beyond national jurisdiction.
- Article 136 → Common Heritage of Mankind.
- Article 137 → No Sovereignty / No Appropriation.
- Article 140 → Benefit of Mankind.
- Article 141 → Peaceful Purposes.
- Article 143 → Scientific Research.
- Article 144 → Technology Transfer.
- Article 145 → Environmental Protection.
- Article 148 → Developing States.
- Article 149 → Archaeological/Historical Objects.
- Article 153 → Activities in the Area.
- Activities include:
- prospecting;
- exploration;
- exploitation.
- Activities operate through plans of work and contracts.
- Sponsoring States have due-diligence obligations.
- 2011 Seabed Disputes Chamber Advisory Opinion → sponsoring-State responsibility.
- Assembly → principal policy-making body.
- Council → executive organ.
- Legal and Technical Commission → expert legal/technical body.
- Secretariat → administration.
- Enterprise → organ intended for direct participation in Area activities.
- 1994 Implementation Agreement → modified original Part XI arrangements.
- ISA ≠ UN principal organ.
- ISA ≠ ITLOS.
- ISA ≠ CLCS.
- ISA ≠ IMO.
- ISA ≠ coastal-State government.
- ISA does not regulate high seas generally.
- ISA does not regulate national continental shelves.
- Beyond 200 nm ≠ automatically ISA jurisdiction.
- Central principle:
ISA = International Regulation of the Common Heritage
One-Line Memory Trick
“156 – 159 – 161 – 165 – 166 – 170”
156 → ISA Established
159 → Assembly
161 → Council
165 → Legal & Technical Commission
166 → Secretariat
170 → Enterprise
And for substantive principles:
“136 – 137 – 140 – 145”
136 → Common Heritage
137 → No Appropriation
140 → Benefit of Mankind
145 → Environment
Final ISA Formula
Area
↓
Common Heritage of Mankind
↓
International Seabed Authority
↓
Assembly
Council
Legal & Technical Commission
Secretariat
Enterprise
↓
Regulation of Activities
Prospecting
↓
Exploration
↓
Exploitation
↓
Benefit of Mankind
Environmental Protection
Conclusion
The International Seabed Authority is the central institutional mechanism for implementing the Common Heritage of Mankind regime established by UNCLOS for the deep seabed beyond national jurisdiction.
Under Article 156, the ISA is established to organise and control activities in the Area. Its authority is not based on territorial sovereignty; rather, it is an international regulatory authority operating within the legal framework of Part XI of UNCLOS.
The most important substantive principles underlying its work are:
Article 136 → Common Heritage of Mankind
Article 137 → No National Appropriation
Article 140 → Benefit of Mankind
Article 145 → Environmental Protection
The ISA regulates activities such as:
- prospecting;
- exploration;
- exploitation;
through mechanisms including plans of work, contracts, regulations and compliance requirements.
Its principal organs include the Assembly, Council, Secretariat and specialised bodies such as the Legal and Technical Commission and Finance Committee, while the Enterprise is established as an organ under Article 170.
The 1994 Implementation Agreement is essential because it modified important elements of the original Part XI regime and shaped the modern operation of the ISA.
Environmental protection is now one of the most significant aspects of seabed governance. The ISA must balance the potential economic value of deep seabed minerals with the obligation to protect fragile marine ecosystems.
The 2011 Seabed Disputes Chamber Advisory Opinion on sponsoring States is particularly important for understanding the responsibilities of States sponsoring entities engaged in activities in the Area, especially the obligation of due diligence.
The most important distinction to remember is:
ISA → Area
Coastal State → Continental Shelf
IMO → International Shipping
ITLOS → Dispute Settlement
CLCS → Outer Continental-Shelf Limits
Ultimately:
The International Seabed Authority converts the Common Heritage of Mankind principle into an institutional system for regulating deep seabed activities for the benefit of mankind as a whole while protecting the marine environment.
For examination purposes, remember:
156 – 159 – 161 – 165 – 166 – 170
156 → Establishment
159 → Assembly
161 → Council
165 → Legal & Technical Commission
166 → Secretariat
170 → Enterprise
And:
136 – 137 – 140 – 145
Common Heritage → No Appropriation → Benefit of Mankind → Environment
