The Incident Command System (ICS) is only applicable to large, complex incidents.

IS-251.A: Integrated Public Alert and Warning System (IPAWS) for Alerting Administrators Answers

Here are the FEMA IS-251.A: Integrated Public Alert and Warning System (IPAWS) for Alerting Administrators Answers

Here are the FEMA IS-247.B: Integrated Public Alert and Warning System (IPAWS) For Alert Orginators Guide