The Play Nice Policy is not located in the library either, its located in this subforum: Server chat - its a sticky.
https://www.project1999.com/forums/s...d.php?t=132299
There are also other rules listed in the EC trading subforum that relates to scamming and fraud.
Basically what Cecily said, there are many rules on this server and some of them are even unwritten. Its confusing for a new player but such is life on P99