Resolution criteriaThe window begins on September 6, 2026 and ends on October 4, 2026 at 23:59 UTC. Resolve Yes if, during this window, the United States and Iran formally conclude a written agreement that materially governs Iran's nuclear program. The agreement itself must be publicly evidenced by its text, signatures, or a consensus of independent credible reporting; an announcement, negotiation statement, ceasefire, memorandum, or negotiation round alone does not qualify. Resolve No if no such agreement is concluded during the window. Source: The Guardian (authoritative).