Not sure why EME hasn't posted this here themselves, but here it is!
(from the roleplay forum post found here. http://tera-forums.enmasse.com/forums/roleplay/topics/Roleplay-Server-Rules-and-FAQ-11646 )

Hail, and well met!

We will be officially creating a PvE roleplay server, Celestial Hills. Below are more details that were not outlined in our blog and answers to some of your questions. This information outlines what we are working on but this is not yet final. Please share your constructive feedback below and we will work on making your TERA RP experience better.

Roleplay Server Rules
tl;dr - Don’t be a RP troll; find another server

En Masse is excited to bring a dedicated roleplay server to TERA. To help promote and keep an immersive environment, our roleplay servers will have stricter guidelines for certain aspects of gameplay. In addition to our standard rules of conduct; we’ve outlined RP specific guidelines below. Violations of RP rules can result in character silences, suspensions, and end in account termination.

Don’t Troll
Roleplaying is a preference of game play that En Masse wants to promote for TERA. Like any preference, there are those that enjoy it and those that do not. If roleplaying is not your style then don’t play on a RP server.

Out of Character Chat -- Harassment
Out of Character Chat (OOC): It goes without saying, but avoid out of character chat on the role play server. We realize this might be difficult at all times, and an occasional slip will happen. While we won’t be actively monitoring out of character chat, if we receive player reports of harassment or blatant disregard for OOC we will take action.

Naming Conventions

What types of names are off-limits?
Names that are Leet or dudespeak
Pwny.For.Hire, Umad.Bro
Sentences for names
Iamthe.Destroyerofworlds, Dontturnaround
Pop-culture or real world names that don’t fit in the world of TERA
Bieber.The.Young, George.Washington
Plus all the other names we already do not allow.
Swearing, harassment, racism, En Masse staff names, etc.


FAQ
How many RP servers will there be?
Initially there will be one server, Celestial Hills. If the need for another server arises as we move to open beta and eventually launch, we'll add additional roleplay servers.

Will the server name(s) be identified as “roleplay” in the TERA server list?
Yes, we will be either adding RP or Roleplay to the server name to distinguish it as a Roleplay server.

Will the first roleplay server be PvP or PVE?
Celestial Hills will be a PvE server.

Will there be support for the roleplay server(s)?
Our support staff wants nothing more than to ensure the best overall experience to all of our players. This server will be fully supported just as much as a non-roleplay server.

Will you be monitoring names on the roleplay server(s)?
As mentioned in the blog article, we are proposing to support a “name review” 60 days after launch for our roleplay server or servers.

I reported a non-roleplay name but the support team didn’t change it.
Every report is reviewed, but this is a very difficult policy to enforce because by nature it is based upon opinion. There will be obvious cases but there will be not-so-obvious cases as well. This said, we will do our best to meet and maintain the spirit of roleplay.

What about talking out of character in general chat?
We do not plan to monitor out of character chat. If someone is using Out of Character
(OOC) chat to continually harass, we’ll boot them from the game.

We need /emote and the ability to walk!
We currently have /emotes in TERA and we are working on a list of game features to enhance your roleplay experience. Just like all game feedback we are evaluating and prioritizing getting it in the game.

Please share your constructive feedback below and we will work on making your TERA roleplay experience better.

Knoxxer

Thanks for posting this here!

NP EME can Either Sticky this or Delete it and make their own.

That's pretty neat. I just assumed the "RP" label on the server was about the limit for the devs involvement. Nice to know there'll be a bit of moderation to keep things running smoothly.

for great justice

Good to know... Thanks for sharing it here...

I know there are few non-RP players and new to RP that will be playing in Celestial Hills, so I'm just making a quick guide on how you can communicate with fellow hardcore roleplayers without confusing them and yourself.. :p

OOC Conversations

1. What is OOC?

OOC is an abbreviation for Out of Character.

2. How do you use OOC in a Roleplay environment?

Although this topic is debatable in the RP community, the best way to use OOC conversations is to use brackets.

Example:

((I'm very sorry, my spelling has been off tonight!!!))
((Would you like to join my guild?))
((Your character is soooo cute!))
((I need to AFK for a few...))
((Oops my character is afraid of Catgurlz..))
((I'm so bored, anyone would like to join SB?))

3. Where is the best place to use OOC?

If you are on a team full of Roleplayers, and would like to point out something before starting a dungeon or a BAM do not be afraid to say so.. If the team happens to be In Character (IC) most of the time, using brackets on OOC is a sign of respect to fellow RP'rs.

On Guild chat, depends on a guild you can ask for help using OOC or just start a conversation.

On Area, Trade, Local, Private Tells chat, although many RP'rs disagree with this.. Using brackets is a sign of respect to fellow Roleplayers.

4. What is IC?

IC is an abbreviation for In-Character.

5. Does using brackets a mandatory thing?

No. Some people do not log in the forums to know the rules of a server. Some RP'rs use:

[[Example text here..]]
[Example text here..]
(Example text here..)
Example text here..))
Example text here..)
Example text here..]

Some people don't use it at all, but they make sure they mention being OOC.

Lastly, we should all respect each other and make the community the best place to play and enjoy.

Hello.
It has been a long time since I've done any real Role Play. I look forward to getting into character on the open betea this coming weekend.
Thank you for the advice. And if I am not doing thing correctly, please tell me, as I'd really like to participate in this type of MMORPG experience.

/support

*hugs Calindor* Thank for re-posting this!