The rules etc. written in this booklet were known to us as we had already been taught them beforehand.
The majority were ordinary things people had no choice but to follow in order to protect their lives.
Don’t obstruct other adventurers. Don’t steal property or kill. Don’t cause trouble in villages or towns you drop by en route. Don’t commit crimes.
Because adventurers have a tendency to be a gathering of talented people from anywhere* no matter what, there are many facts written down for caution’s sake. (T/N: “anywhere” here was written “from thousand seas and mountains” … interpreted it)
Also, since adventurers are a kind of ‘dissatisfied youth’ attracted to equipment in this war-less period, they are people having an inclination to gather and do rash things.