The RMT must be carried by all stations within 15 minutes of receipt. The COO includes the RMT script. This COO is last because not all Local Areas have a need to authenticate telephonic activation requests. Radio transmissions and hard copy do not require authentication. FAX, not encouraged and seldom used, does require authentication.
Typical authentication requires matching numbers with code words.
COOs can be amended overnight. The Local Area COOs then become a part of the State Plan. Thus your EAS Plan need never be out of date. You may like this approach in your state. State and local emergency management officials should be members of the state and local FCC committees.