Which of the following is NOT included in the definition of a significant threat that might trigger a PPR?

The identification of a significant threat that may trigger a Preemptive Response (PPR) is based on a variety of factors that typically involve immediate risks or concerns regarding safety and security. A community gathering, while it may have the potential to present risks depending on context, is generally not classified as a significant threat by itself. Community gatherings can be peaceful and organized events that often pose no inherent danger, especially when conducted under normal circumstances with proper oversight and security measures in place.

In contrast, the other options—suspicious packages, small boat probes, and CBRNE (Chemical, Biological, Radiological, Nuclear, and Explosives) incidents—are characterized by their potential to indicate immediate threats or acts of malfeasance. Suspicious packages could potentially contain harmful materials, small boat probes may suggest unauthorized surveillance or intrusion into restricted areas, and CBRNE incidents represent significant and immediate hazards to public safety. These scenarios require immediate attention and response to prevent possible harm, differentiating them sharply from the nature of a community gathering.