A crew member takes part in a fire drill on China's largest and most advanced patrol vessel Haixun 01 on the South China Sea, April 4, 2016. [Photo/Xinhua]

GRONINGEN, The Netherlands - The arbitral tribunal in the Philippines' South China Sea (SCS) arbitration exceeded its competence by circumventing the real disputes and by degrading the role of States, such arbitral expansion is detrimental to the settlement of disputes, said Haibo Gou, legal advisor and counsellor at the Chinese embassy in the Netherlands.

The Philippines, which illegally occupied some of China's islands and reefs in the SCS in the 1970s, unilaterally filed the arbitration in 2013.

The Philippines raised 15 submissions, on China's U shaped line, on the entitlements of several maritime features, and on the legality of China's activities in the SCS.

The Philippines asserted that these submissions are irrelevant to the territorial and delimitation disputes. And the arbitral tribunal endorsed such assertion with a ruling in October 2015.

Using a graph indicating the relationship between relevant dispute settlement process and the Philippines' submissions, Gou remarked that the settlement of territorial and delimitation disputes is an integral process.

"Territorial dispute needs to be addressed first, to be followed by the settlement of delimitation dispute. Only with the territory and delimitation disputes settled, could the question of legality of activities in disputed area be answered. The Philippines' submissions are either part of or dependent on the territorial and delimitation disputes,"he said at a lecture at Groningen University on Monday.

"Entitlements of maritime features are granted to coastal States. With the territory dispute in the SCS pending, who is the coastal State cannot be answered, the issues of entitlements cannot be addressed. Further, according to established jurisprudence, determinations on entitlements are the first step of any delimitation. Thus the submissions on entitlements are subsequent to the settlement of territorial dispute, and are part of delimitation," he explained.

"Territorial disputes are not the subject matter of the United Nations Convention on the Law of the Sea (UNCLOS), and China has declared under the Convention that it does not accept compulsory procedures with respect to disputes concerning delimitation. There is no compulsory jurisdiction over disputes in the SCS," the Chinese diplomat told scholars and students attending the lecture in the north of the Netherlands.

In his opinion, the arbitral tribunal exceeded its power because firstly, compulsory arbitration is "subject to" China's declaration made under the UNCLOS.

"With China's declaration, the establishment and functioning of the arbitral tribunal has no legal basis," he said.

"The tribunal has further exceeded the limits of arbitral power when it failed to fulfill the duty of isolating real disputes," he added.