The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
The UN's conference page says it was 'held in Nice, France, from 9 – 13 June 2025'; UN News reported the close on Friday 13 June.
The UN's own conference page: co-hosted by France and Costa Rica and 'held in Nice, France, from 9 – 13 June 2025', theme 'Accelerating action and mobilizing all actors to conserve and sustainably use the ocean'.[1]
Follow-up to the Nice ratification push: Morocco and Sierra Leone became the 60th and 61st parties on Friday 19 September 2025, clearing the threshold for the treaty to take effect in January 2026.[1]
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