Jay Treaty between Great Britain and the United States, it was perceived as a hybrid process that combined legal proceedings with diplomatic negotiations. For instance, some of the disputes submitted to arbitration under the Jay Treaty were to be decided according to “justice, equity, and the laws of nations”, and their successful settlement was largely credited to the commissioners’ “spirit of negotiation and compromise”. While they rendered binding decisions and applied legal principles, the commissioners also “act[ed] to some extent as negotiators rather than as judges … temper[ed] justice with diplomacy [in order] to give a measure of satisfaction to both sides” (Pinto, 1990). This perception of interstate arbitration persisted in the first decades of the 20th century. Some states, for instance, distinguished between judicial settlement, designed to resolve “legal disputes”, and arbitration, designed to resolve all other disputes ex aequo et bono while “having regard to the general principles of international law” (e.g., the 1928 Geneva General Act for the Pacific Settlement of International Disputes (.pdf); the 1957 European Convention for the Peaceful Settlement of Disputes). Arbitrators were also “prepared to waive a strict application of the law in order to achieve an acceptable settlement” in interstate disputes, such as the 1909 Casablanca case and the 1910 North Atlantic Fisheries case (M.C.W. Pinto, “Structure, Process, Outcome: Thoughts on the ‘Essence’ of International Arbitration” (1993) 6 Leiden Journal of International Law). However, as a result of the growing global quest during the 20th century for “orderly” interstate dispute settlement through the application of law, this quasi-diplomatic use of interstate arbitration gradually fell into disuse, and the dominant perception became that of the International Law Commission, which viewed it as “a procedure for the settlement of disputes between States ... on the basis of law” (Pinto, 1990 (.pdf)). Accordingly, states increasingly restricted or excluded the power of arbitrators to decide disputes on the basis of equity or non-legal considerations and in all but a few rare, yet successful, cases (e.g., the 1968 Rann of Kutch arbitration; the 1986 Guinea-Guinea Bissau arbitration) arbitrators followed suit. The perception that only ‘judicial’ arbitration based on law should be “arbitration properly so called” thus became the conventional wisdom, even though in some cases, such as the 1977 Beagle Channel arbitration, it failed to resolve the parties’ dispute (Pinto, 1990, 1993).