Don't worry. We de-duplicate non-anonymous signatures automatically, and anonymous signatures within 24 hours (before personal data is deleted). For anonymous signatories beyond 24 hours, we cannot verify there are no duplicates, though there is one human who manually reads all signatures and will try hard to notice and correct any abuse of the system.
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第十二条 国家支持仲裁机构加强与境外仲裁机构和有关国际组织的交流合作，积极参与国际仲裁规则的制定。