"Depends on your filing system, I suppose. Usually in with the rest of your maps and scribe notes and other important Information."
"What are they, exactly?", you ask.
"Nothing fancy. The ruler and general and them lot each send out an important message from time to time. Not so much orders as the rules for the realm and long-term stuff. Since it's so important, it's marked specially and isn't listed with the rest of your messages -- too easy to lose. Before you first set out, your scribe will make sure you have copies of all the bulletins, so you have them to look over. Not exactly great literature, but worth reading."