What was asked?
Urges leaders to join the Treaty on the Prohibition of Nuclear Weapons.
Who would need to act?
Current national leaders
What would count as delivery?
Treaty signature, ratification and implementation records; influence by this letter requires separate evidence.
What the record currently supports
The source establishes the published position. Subsequent implementation has not been assessed in this record; this does not mean no action occurred.
The evidence trail
Original position published
Join the nuclear banAdded to the archive
The record preserves the question. An absence of assessed follow-up is not a finding that no action occurred.