ARES® is a registered trademark of the ARRL as is the name "Amateur Radio Emergency Service®".
The ARRL board of directors has decided that ALL material that uses the "Amateur Radio Emergency Service®" name or the ARES® acronym is now the property of the ARRL. To remain in compliance with their wishes, I sent the complete set of ECom level 4 documents to Dan Miller, K3UFG at ARRL dot org
If you need copies of the document you were looking for, contact Dan for that material.
If you would care for the latest ECom material (release 5) it will be found at w0ipl.net/ECom.
Pat Lambert - W0IPL