11. A narrow concept of jurisdiction may, perhaps, be warranted in a national context but not in international law. International law, because it lacks a centralized structure, does not provide for an integrated judicial system operating an orderly division of labour among a number of tribunals, where certain aspects or components of jurisdiction as a power could be centralized or vested in one of them but not the others. In international law, every tribunal is a self-contained system (unless otherwise provided). Of course, the constitutive instrument of an international tribunal can limit some of its jurisdictional powers, but only to the extent to which such limitation does not jeopardize its "judicial character", as shall be discussed later on. Such limitations cannot, however, be presumed and, in any case, they cannot be deduced from the concept of jurisdiction itself.