In case you have not noticed, this thread is about the SCS and the UN tribunal has already rules that China's occupation of the islands is illegal. As such its claim of sovereignty is simply belligerent act. If to wish to discuss other countries start a new thread. As Deino has advised, stay on topic or is it rules somehow don't apply to you guys?
It is not UN tribunal It is private arbitration panel paid for and stacked with full US appointee It has no jurisdiction at all
The UN go full length to distance themselves from this panel
Now ICJ IS UN BODY
Wikipedia has this to say about the PCA.‘The PCA is not a “court" in the conventional understanding of that term but an administrative organization with the object of having permanent and readily available means to serve as the registry for purposes of international arbitration and other related procedures, including commissions of enquiry and conciliation. The judges or arbitrators that hear cases are officially called "Members" of the Court.
The public at large is usually more familiar with the International Court of Justice than with the Permanent Court of Arbitration, partly because of the closed nature of cases handled by the PCA and also the small number of cases dealt with between 1946 and 1990. Sometimes even the decision itself is kept confidential at the request of the parties.’
To simplify, this is a private entity established to facilitate arbitration by member states on a willing buyer willing seller basis. It is quite like a commercial establishment, any member state can come to seek help to arbitrate their disputes. It is not a court! It is not a world body like the UN or sanctioned by the UN. Its jurisdiction and ruling are as good as the disputing parties want it to be. It has no authority and no legal status if a disputing party is not willing to subject itself to its arbitration. The closest example of such a court is the international court in Tanjong Pagar in Singapore, a convenient store for customers to avail themselves of its facilities.