Final answer:
Fire and rescue departments should create SOPs for when an Incident Safety Officer (ISO) must respond automatically, which include protocols, guidelines, and checklists to ensure structured and safe incident management.
Step-by-step explanation:
In defining when an Incident Safety Officer (ISO) is required to respond, the individual fire and rescue department should develop SOPs (Standard Operating Procedures) for an automatic ISO response as well as SOPs for circumstances that mandate an automatic ISO delegation during the incident. Protocols, guidelines, and checklists could be part of these procedures, with each playing a unique role in incident management. SOPs are essential as they provide a consistent and structured approach for fire and rescue personnel to follow in various situations, which helps to ensure safety and effectiveness during operations.