What is a requirement for the deployment of rapid response members?

The requirement for the deployment of rapid response members involves receiving authorization from the incident commander. This is crucial because the incident commander is responsible for managing the incident, making real-time decisions about the allocation and deployment of resources, including personnel. The incident commander assesses the situation and determines whether the deployment of rapid response members is necessary to effectively handle the incident.

This ensures that the response is coordinated and appropriately aligned with the specific needs of the situation at hand, which helps in maintaining order and safety. The authority and situational awareness of the incident commander are essential for effective management of resources during critical events, making this option the correct choice.