Any Legion worth the name needs a decent emblem. It's a badge of pride for everyone in the Legion.
You have to work hard to increase your Legion's level, however.
At level 2 you can modify your emblem. When you reach level 3 you're allowed to register a custom-designed emblem of your own creation.
Something has gone wrong--very wrong. I can't do my job! Blast! Shards! Fie!
Please enter /petition in your Chat window and inform a GM.
I'm counting on you, [%username], to help me.
I'm afraid you can't just change your Legion emblem as readily as you change your socks. A Legion must reach at least level 2 before its emblem can be modified.
To register a self-made emblem, you need Legion level 3.
Off you go, work hard, and I'll see you again when you've earned the right to make changes.