Final answer:
To comply with OSHA regulations, the ISO should align with the technician level requirements specified in NFPA 1670 for confined space, trench, and cave-in rescues.
Step-by-step explanation:
To ensure compliance with the Occupational Safety and Health Administration (OSHA) regulations related to confined space, trench, and cave-in rescues, the Incident Safety Officer (ISO) must match the technician level requirements of NFPA 1670. This standard, titled "Standard on Operations and Training for Technical Search and Rescue Incidents," provides guidelines for organizations that are responsible for conducting technical search and rescues, particularly in specialized rescue situations involving confined spaces, trenches, and structural collapse. NFPA 1670 specifies the minimum job performance requirements for individuals who are involved in these types of rescue operations.