The ARRL has removed the old Public Service Communication Manual (PSCM) from it’s website and replaced it with separate manuals for it’s ARES and NTS programs.
The 2015 version of the NTS manual can be found by clicking here.
Anyone interested in message handling will obtain valuable information in this document, along with the extensive Methods and Practices Guide which can be viewed by clicking here.
I encourage you to look through them.
Marcia KW1U, STM