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This work is excerpted from an official document of the League of Nations. Property of the League of the Nations was transferred to the United Nations when the league dissolved in 1946. The policy of the United Nations is to keep most of its documents in the public domain in order to disseminate "as widely as possible the ideas (contained) in the United Nations Publications".
Official records (proceedings of conferences, verbatim and summary records, ...)
United Nations documents issued with a UN symbol
Public information material designed primarily to inform the public about United Nations activities (not including public information material that is offered for sale, which, if in the public domain in the United States due to no copyright renewal or notice as required, should be instead tagged ((PD-US-no-renewal)) or ((PD-US-no-notice))).