Final answer:
NFPA 1561 is the NFPA standard that pertains to an emergency services incident management system, providing guidelines for the management and coordination of emergency services operations during incidents.
Step-by-step explanation:
The NFPA standard that pertains to an emergency services incident management system is NFPA 1561. NFPA 1561 is the standard for Emergency Services Incident Management System and it provides guidelines for the management and coordination of emergency services operations during various incidents. It covers topics such as incident management structure, resource management, communication, and incident documentation.