An international tribunal is set to give a long-awaited ruling, with implications for China’s controversial claims in the disputed South China Sea.The case at the tribunal in The Hague was brought by the Philippines, which argues Chinese activity in the region is against international law.China claims about 90% of the South China Sea, including reefs and islands also claimed by others. China says it does not recognise the tribunal and has refused to take part, reports BBC.The case is being decided by an arbitration tribunal under the United Nations Convention on the Law of the Sea (UNCLOS), which both countries have signed.However, observers say the decision could favour the Philippines - and China risks reputational damage if it does not abide by it.They also warn there is a risk that China could react aggressively to a ruling against it. The ruling is binding but the tribunal, the Permanent Court of Arbitration, has no powers of enforcement. The US has sent an aircraft carrier and fighter jets to the region, prompting an angry editorial in the Global Times, a strongly nationalist state-run newspaper, calling for China to prepare for ‘military confrontation’.Meanwhile, the Chinese Navy has been carrying out exercises near the disputed Paracel islands. The tribunal has previously said it is the appropriate body to rule on at least seven of the 15 claims in the Philippines’ case and was still considering the other eight.China has been trying to gather international support. Its diplomats have written a slew of articles setting out their government`s position in English-language media around the world.China says about 60 countries support its stance that the tribunal’s ruling should be rejected, but few have declared their support publicly.The Philippines brought a case in 2013 to the UNCLOS tribunal, contesting China’s claims and activity in the South China Sea, saying that they were contrary to international law. It has accused China of interfering with fishing, dredging sand to build artificial islands, and endangering ships, among other claims. It also asked the tribunal to reject China’s claims to sovereignty over waters within a ‘nine-dash line’, the dotted boundary that claims as much as 90% of the South China Sea, that appears on official Chinese maps.