The Court's jurisdiction was largely optional, but there were some situations in which they had "compulsory jurisdiction", and states were required to refer cases to them. That came from three sources: the Optional Clause of the League of Nations, general international conventions and "special bipartite international treaties".[93] The Optional Clause was a clause attached to the protocol establishing the court and required all signatories to refer certain classes of dispute to the court, with compulsory judgments resulting.