Matches in DBpedia 2014 for { ?s ?p Ninety days after the ratification by at least 50 signatory states. }
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- Minamata_Convention_on_Mercury conditionEffective "Ninety days after the ratification by at least 50 signatory states".
- Rotterdam_Convention conditionEffective "Ninety days after the ratification by at least 50 signatory states".
- Stockholm_Convention_on_Persistent_Organic_Pollutants conditionEffective "Ninety days after the ratification by at least 50 signatory states".