I'm reading through the "Deluxe" 1987 rules and I can't for the life of me find anything on how the Command Post is deployed.
Is it a "free" unit that the defender always has to deploy?
I don't know how different the 1987 rules are from the current pocket edition, but FWIW rule 1.03 in the current pocket edition's rules has it. "The defense sets up first. The defending player gets 20 points of ... (blah-blah). These units are set up in the obstructed area of the map, as is the command post." Out of curiosity, does your rulebook not have such a sentence?