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The PCA is not a court in the traditional sense, but a permanent framework for arbitral tribunals constituted to resolve specific disputes.

The PCA has a three-part organizational structure consisting of an Administrative Council that oversees its policies and budgets, a panel of independent potential arbitrators known as the Members of the Court, and its Secretariat, known as the International Bureau, headed by the Secretary-General.

As part of its environmental dispute resolution services, the PCA maintains a list of arbitrators who specialize in disputes relating to the environment and natural resources, as well as a list of scientific and technical experts who may be appointed as expert witnesses under the PCA’s Environmental Rules.