Helsinki Principles on the Law of Maritime Neutrality


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Helsinki Principles on the Law of Maritime Neutrality
1. General provisions
1.1. Definition
For the purposes of the following Principles,  neutral State means any State which is not party to an
international armed conflict;  belligerent means a State which is a party to that conflict;  neutral waters
comprise the internal waters of a neutral State, its territorial sea, and, where applicable, its archipelagic
waters within the meaning of Articles 9 and 50 of the United Nations Convention on the Law of the Sea of
1982 (hereinafter: UNCLOS); prima facie  neutral ships are ships flying the flag of a neutral State.
1.2 The Effect of the Charter of the United Nations
Nothing in the present Principles shall be construed as implying any limitation upon the powers of the
Security Council under Chapters VII and VIII of the United Nations Charter. In particular, no State may rely
upon the Principles stated herein in order to evade obligations laid upon it in pursuance of a binding
decision of the Security Council. Nor shall the present principles be construed as denying the inherent right
of individual or collective self-defence recognized in Article 51 of the Charter.
1.3 General Rule
The relations between a party to a conflict and the neutral State, are, as a matter of principle, governed by
the law of peace. These relations may, however, be modified to the extent that there exist other principles or
rules of international law to that effect, including those contained in the present Principles.
1.4 Inviolability of Neutral Territory
Belligerents must respect the inviolability of neutral territory. In consequence, belligerents may not conduct
hostilities in neutral territory and in neutral waters, except in individual or collective self-defence and subject
to Principle 2.1. In conducting hostilities elsewhere, belligerents must exercise due regard to prevent to the
maximum extent possible collateral damage on neutral territory, neutral waters or the airspace over these
areas.
2. Belligerent activities in neutral waters
2.1 Hostilities in neutral waters
If neutral waters are permitted or tolerated by the coastal State to be used for belligerent purposes, the
other belligerent may take such action as is necessary and appropriate to terminate such use.
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2.2 Twenty-four hours rule
The right of passage and sojourn of belligerent warships in neutral waters and ports is governed by the
relevant provisions of The Hague Convention XIII of 1907, which reflect customary law. In particular, the
duration of such passage and sojourn must not exceed 24 hours, except where the condition of the ship or
the sea do not permit the ship to leave the neutral waters. The neutral State may establish different time
limits, provided that the principle of impartiality is observed and the measure is given due publicity. In case
of a violation, the neutral State must take measures to terminate this violation.
2.3 Suspension of passage
The neutral State may suspend temporarily in specified areas of its territorial sea and archipelagic waters
the innocent passage of foreign ships if such suspension is essential for the protection of its security,
provided that the principle of impartiality is observed, and the suspension is duly published.
2.4 Special rights of passage
The 24 hour limitation does not apply to innocent passage through archipelagic waters, to transit passage
through international straits or archipelagic sea lanes passage if the time ordinarily needed for this passage
is more than 24 hours. In this case, the passage is subject to the relevant rules of international law. In
particular, it must be continuous and expeditious.
3. Hostilities on the High Seas
3.1 The Conduct of Hostilities
In conducting hostilities on the high seas, the parties to the conflict must have due regard to the exercise of
the freedoms of the high seas by neutral States. In particular, neutral shipping and fishing activities may be
limited pursuant to these Principles, but in no case completely excluded.
3.2 Areas of naval hostilities
Neutral ships should be aware of the risk and peril of operating in areas where active naval hostilities take
place. Belligerents engaged in naval hostilities must, however, take reasonable precautions including
appropriate warnings, if circumstances permit, to avoid damage to neutral ships.
3.3 Special Zones
Subject to Principle 5.2.9 and without prejudice to the rights of commanders in the zone of immediate naval
operations, the establishment by a belligerent of special zones does not confer upon that belligerent rights
in relation to neutral shipping which it would not otherwise possess. In particular, the establishment of a
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special zone cannot confer upon a belligerent the right to attack neutral shipping merely on account of its
presence in the zone. However, a belligerent may, as an exceptional measure, declare zones where neutral
shipping would be particularly exposed to risks caused by the hostilities. The extent, location and duration
must be made public and may not go beyond what is required by military necessity, regard being paid to the
principle of proportionality. Due regard shall also be given to the rights of all States to legitimate uses of the
seas. Where such a zone significantly impedes free and safe access to the ports of a neutral State and the
use of normal navigation routes, measures to facilitate safe passage shall be taken.
4. Sea Areas Subject to Limited Jurisdiction
Exclusive economic zone, fishery zones and continental shelf
When conducting hostilities, the belligerents shall have due regard for the neutral States sovereign and
jurisdictional rights over their exclusive economic zone, fishery zones or in sea areas above their continental
shelf, for the preservation of the marine environment and for underwater cultural property in neutral States
territorial sea and contiguous zone. Belligerents shall, in particular, have due regard for artificial islands,
installations, structures and safety zones established by neutral States in their exclusive economic zone and
on their continental shelf.
5. Neutral Ships and Activities
5.1 Limitations on attacks
5.1.1 Neutral ships in belligerent ports
A neutral ship in a belligerent port enjoys the same protection against attacks as civilian objects in land
warfare. Neutral ships exempt from attack, e.g. hospital ships, retain that exemption in belligerent ports.
Neutral warships in belligerent ports retain their right of self-defence.
5.1.2 Protection against attacks
(1) Subject to Principle 5.2, neutral ships enjoy freedom of navigation according to the law of the sea
regardless of the existence of an armed conflict and even if they carry goods exported from a belligerent
State to a neutral State.
(2) Merchant ships flying the flag of a neutral State may not be attacked except as provided in paragraphs 3
and 4.
(3) Merchant ships flying the flag of a neutral State may be attacked if they are believed on reasonable
grounds to be carrying contraband or breaching a blockade, and after prior warning they intentionally and
clearly refuse to stop, or intentionally and clearly resist visit, search, capture or diversion.
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(4) Merchant ships flying the flag of a neutral State may be attacked if they
(a) engage in belligerent acts on behalf of the enemy;
(b) act as auxiliaries to the enemy s armed forces;
(c) are incorporated into or assist the enemy s intelligence system;
(d) sail under convoy of enemy warships or military aircraft; or
(e) otherwise make an effective contribution to the enemy s military action, e.g., by carrying military
materials, and
it is not feasible for the attacking forces to first place passengers and crew in a place of safety. Unless
circumstances do not permit, they are to be given a warning, so that they can re-route, off-load, or take
other precautions.
(5) Merchant ships flying the flag of a neutral State and carrying only civilian passengers, e.g., liners, may
not be attacked but must be diverted to an appropriate port to complete capture, unless they are
incorporated into or assist the enemy s intelligence system.
(6) Ships flying the flag of a neutral State and entitled to exemption from capture, e.g., hospital ships, may
not be attacked if they are innocently employed in their normal role, do not commit acts harmful to the
enemy, immediately submit to identification and inspection when required, and do not intentionally hamper
the movement of combatants and obey orders to stop or to move out of the way when required.
5.1.3 Precautions in attacks
In conducting attacks by whatever means, the armed forces of a party to the conflict must take all feasible
precautions in order to avoid that
- the attack is directed against a neutral vessel or aircraft,
- lawful neutral activities on the high seas or in other sea areas where the neutral State possesses
sovereign rights are unduly endangered.
5.2 Belligerent control over neutral shipping
5.2.1 Visit and search
As an exception to Principle 5.1.2. paragraph 1 and in accordance with Principle 1.3 (2nd sentence),
belligerent warships have a right to visit and search vis-Ä…-vis neutral commercial ships in order to ascertain
the character and destination of their cargo. If a ship tries to evade this control or offers resistance,
measures of coercion necessary to exercise this right are permissible. This includes the right to divert a ship
where visit and search at the place where the ship is encountered are not practical.
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5.2.2 Seizure and condemnation
Cargo constituting contraband and a ship carrying such cargo may be seized by a belligerent, brought
before a prize court and condemned. Confiscation without a prize court decision is prohibited.
5.2.3 Contraband
Contraband are goods ultimately destined to the enemy of a belligerent which are designed for the use of
war fighting and other goods useful for the war effort of the enemy.
5.2.4 Enemy destination
In cases of doubt concerning the enemy destination of goods or their use for enemy military purposes, the
burden of proof lies with the captor State. Fuel or other material which could be used for energy production
purposes destined for a belligerent constitutes contraband, unless a non-military destination is clearly
established.
5.2.5 Exports
Goods with a neutral destination coming from a belligerent port do not constitute contraband.
5.2.6 Navicert
In order to simplify control procedures in respect of neutral shipping, a party to the conflict may issue an
inspection document (navicert) to a neutral ship in the port of loading. This navicert constitutes proof that
the ship in question is not carrying contraband if controlled by the party having issued the document. The
navicert is not binding on the other party, but the fact that a ship carries a navicert issued by another party
may not be used to the ship s disadvantage.
5.2.7 Public ships not subject to visit and search
A neutral warship or other governmental ship operated for non-commercial purposes is not subject to the
right of visit and search or the rights described in Principle 5.2.10.
5.2.8 Immunity of convoys
The same rule stated in Principle 5.2.7 applies to a convoy of merchant ships flying a neutral flag and
accompanied by one or more neutral warships. The commander of the convoy, or the neutral State whose
flag the convoying warships fly, has the responsibility to certify that no contraband is carried in the convoy.
The neutral flag State has to take all reasonable steps to ensure that the certificate is correct.
5.2.9 Transit
Neutral ships, whether commercial or warships, enjoy the right of transit passage through international
straits, the right of archipelagic sea lanes passage through archipelagic waters and the right of innocent
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passage through the territorial sea or archipelagic waters of belligerents, regardless of the existence of an
armed conflict. A coastal State may, however, subject such rights to reasonable defence requirements. The
belligerent may not close international straits and archipelagic sea lanes.
5.2.10 Blockade
Blockade, i.e. the interdiction of all or certain maritime traffic coming from or going to a port or coast of a
belligerent, is a legitimate method of naval warfare. In order to be valid, the blockade must be declared,
notified to belligerent and neutral States, effective and applied impartially to ships of all States. A blockade
may not bar access to neutral ports or coasts. Neutral vessels believed on reasonable and probable
grounds to be breaching a blockade may be stopped and captured. If they, after prior warning, clearly resist
capture, they may be attacked.
5.3 Relief
A blockade may not be used to prevent the passage of relief consignments which has to be free according
to the applicable rules of international humanitarian law, in particular those contained in Articles 23, 59 and
61 of the Fourth Geneva Convention or Articles 69 and 70 of Protocol I Additional to the Geneva
Conventions.
6. The Protection of Neutral Shipping and Other Neutral Activities
6.1 Right of Convoy
The right of neutrals to convoy is recognized. Consequently, neutral States have the right to accompany
commercial ships flying their own or another neutral State s flag by their warships. The exercise of a right of
innocent passage, transit passage or archipelagic sealanes passage by such convoys does not constitute a
forbidden use of force.
6.2 Mines
Neutral warships have the right to remove mines laid by a belligerent in violation of applicable rules of
international law, in particular if they illegally hamper neutral shipping, on the high seas, in an exclusive
economic zone (including its own) or in waters above the continental shelf. They may not do so within the
territorial sea of a belligerent State, except to the extent necessary for the exercise of the right of transit
passage or archipelagic sea lanes passage.
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7. Land-locked States
Land-locked States
If a port in one belligerent State is used for the purposes of transit to and from a neutral landlocked State
under any applicable international agreement or arrangement, the other belligerents shall not prevent ships
carrying goods destined for, or exported by, the neutral landlocked State from leaving or entering the port.
Nor shall the belligerent State through whose port such goods transit take measures to interfere with their
passage other than in accordance with Article 125 of the UNCLOS.
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