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The inner perimeter, or isolation zone, during an explosive incident is defined as the area where only personnel directly involved in the response and management of the incident are permitted to enter. This zone is critically established to ensure the safety and security of both the responders and the public. By restricting access to individuals who are not directly involved, it minimizes the risk of additional casualties, contamination, or interference with the incident’s management operations.

The other contexts pertaining to public access or roles, such as allowing the general public or media representatives into the area, are not appropriate within the isolation zone. This zone is specifically designed to create a secured environment that facilitates effective response and prevents potential hazards associated with the explosive incident. Emergency vehicles do not have a designated space in the inner perimeter for parking as this area is focused solely on safety and operational integrity.