In my understanding of the geographical location of the Natuna island, there is no overlap in EEZ with China because the Spratly islands are too far away as a land source to generate EEZ that would overlap with the EEZ of Natuna/Indonesia. China has carefully avoided the issue of the Natuna island itself as being in dispute (which is not) but in reality the issue is with the waters that overlap into the nine dash line. Since the nine dash has no basis in international law to claim any waters without adjacent land mass, China is once again stretching the ambiguity by introducing the traditional fishing ground reasoning as a cover for its actions. In effect it is just double talk and lacks any good will to perform.
No there is such thing as historic water. UNCLOS is very complicated document due to compromise and many sub article. I believe this is what China is aiming. Delineation is not just based on geography but also on historic water read this
The Concept of Historic Rights
The term ‘historic waters’ should not be confused with ‘historic rights.’ Both are legal concepts that exist under customary international law,
but with different scope and legal application. A claim of historic right means that a state is claiming to exercise a certain right in relation to other states by effectively exercising those rights with the acquiescence of the states concerned.
The requirements that must be satisfied in order to successfully establish a claim of historic rights are the same as those required to establish historic waters – in terms of proof of long-established activities and the continuous exercise of these activities with the acquiescence of other states.
Having said that, although the jurisprudence from international courts and tribunals reflects a reluctance to recognize a state’s claim of historic rights, a state will have a better chance of successfully making a claim to historic rights than to historic waters. This is because even though the elements for establishing historic rights are the same as those required for establishing historic waters, there are a few significant differences between the two concepts.
First, historic rights claims do not amount to a sovereignty claim.
Historic rights merely give the claiming state the right to conduct a specific activity – like fishing – due to long usage.
As the ICJ stated in the
Qatar/Bahrain case
, the historic pearling activities of Bahrain have never led to the recognition of a ‘quasi-territorial right’ to the fishing ground itself. This means that even if the historic pearling rights of Bahrain were recognized, it would not have amounted to sovereignty or any form of ‘quasi-sovereignty’ over the pearling banks or to the superjacent waters.
It is surely easier for a state to provide evidence of prolonged fishing activities in an area of water than to try to establish a prolonged exercise of sovereignty over the area. As noted above, it is important to remember that a state’s claim to historic rights does not mean that this right gives the claiming state sovereignty over the relevant body of waters.
Second, a historic rights claim is not exclusive. Since the existence of historic rights in one area does not amount to sovereignty, it is possible for certain rights of other states to exist concurrently in the same body of water. For example, in the
Tunisia/Libya case, Libya recognized Tunisia’s right to fish for sedentary species in the Gulf of Tunis, but claimed that such right was never purported to exclude foreigners from the exploitation of these fisheries.
In the
Eritrea/Yemen arbitration, the Tribunal declared that the recognition of Eritrea’s historic fishing right within Yemen’s territorial sea around the islands of
Hanis and
Zuqar, as well as around the islands of
Jabal al-Tayr and the
Zubayr group, did not exclude Yemen’s enjoyment of the same right, either based on history or on UNCLOS.