The Allied and Associated Powers ultimately entered into five minorities treaties. In addition to that with Poland, treaties were also concluded with Czechoslovakia and the Serb-Croat-Slovene State on 10 September 1919, with Romania on 9 December 1919 and with Greece on 10 August 1920. Since they were all based upon the Polish Treaty, only the differences need be noted. There was, however, a preliminary point of great importance concerning the range of application of the minorities treaty system.

The principle of application

When Wilson first raised the Jewish question in the Council of Four it was assumed that whatever was agreed for Poland would equally apply to Czechoslovakia, as both of them were to be accorded recognition by the treaties and, as its name suggests, the mandate of the New States Committee was restricted to the States which were to be created by the treaties.

From the first, the New States Committee proceeded on the basis that the draft articles it was producing for Poland would apply to Czechoslovakia, but on 6 May the Council of Four agreed to the Committee's request that it be authorized to consider treaties with the Serb-Croat-Slovene State, Romania and Greece. The position concerning the Serb-Croat-Slovene State was complex, since opinions differed as to whether it was a new State, and thus to be treated in the same way as Poland and Czechoslovakia, or whether it was an extension of the Kingdom of Serbia. A case could be made out either way.