Triggering Evidence. The specific facts, events, observations, or inputs that caused a particular decision, recommendation, enforcement action, approval request, or refusal.
Triggering evidence is narrower than an evidence chain. It answers the local question: "What made this decision fire?" In a threshold rule, that means the qualifying events, count, scope, interval, and matched policy. It must be preserved with the audit record so the action can be explained without re-deriving it from logs.