On the signatory Powers no obligation whatever to submit any difference to arbitration is imposed. Even differences of a judicial character, and especially those regarding the interpretation or application of treaties, for the settlement of which the signatory Powers, in article 38, acknowledge arbitration as the most efficacious and at the same time the most equitable method, need not necessarily be submitted to arbitration. Yet the principle of compulsory arbitration for a limited number of international differences was by no means negatived by the Hague Peace Conferences, especially not by the Second Conference. The principle found, firstly, indirect recognition by the Convention respecting the Limitation of the Employment of Force for the Recovery of Contract Debts.[25] Since article I of this Convention stipulates that recourse to the employment of force for the recovery of contract debts claimed from the Government of one country by the Government of another country as being due to its nationals is not allowed unless the debtor State refuses arbitration, compulsory arbitration has in this instance been victorious. [Footnote 25: See above, vol. I. § 135, p. 192, where the so-called Drago doctrine is likewise discussed.] Secondly, although it was not possible to agree upon some stipulation embodying compulsory arbitration for a number of differences in Convention I., the principle itself was fully recognised, and the Final Act of the Second Peace Conference includes, therefore, the Declaration that the Conference "is unanimous (1) in admitting the principle of compulsory arbitration; (2) in declaring that certain disputes, in particular those relating to the interpretation and application of international agreements, may be submitted to compulsory arbitration without any restriction." The above shows reasonable grounds for the hope and expectation that one of the future Peace Conferences will find a way out of the difficulty and come to an agreement stipulating compulsory arbitration for a limited number of international differences.[26] [Footnote 26: See Scott, _Conferences_, pp. 319-385, where the proceedings of both the First and Second Peace Conferences concerning compulsory arbitration are sketched in a masterly and very lucid style.] [Sidenote: Arbitration Treaty and appointment of Arbitrators.]