The Whole Community approach refers to different organizations within the Federal Government.

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-200.B: ICS for Single Resources and Initial Action Incidents Answers