The Singapore Government on 12 December 2018 filed a declaration under Article 298(1)(a) of the United Nations Convention on the Law of the Sea (UNCLOS). This declaration means that other States Parties to UNCLOS cannot unilaterally commence third party arbitration or adjudication against Singapore in respect of maritime boundary disputes. Singapore likewise cannot unilaterally commence third party arbitration or adjudication against other States Parties for such disputes. A statement by the Ministry of Foreign Affairs of Singapore on the matter may be found here.