They're listed under the rules on the op. If you want join, go back to the op to "character bios, etc." and click the link and make a character bio, then make a post in this post and request to join our group. You won't be able to fight until you're tested though.

https://www.bungie.net/en/Forum/Post/212678270/0/0 Here're the rules for this thread. They vary from RP to RP, but are typically along the lines of "Don't be a diсk, don't kill other characters without permission from the RPer that controls them, and don't godmode (dodge all attacks, have enemies attacks so no damage, etc.)."