There are general rules outlined by World of Tanks as to what the insignia can have in it. The link is here

http://forum.worldoftanks.com/index.php?/topic/57289-clan-logo-spec/

If you're interested, we're looking for a cool/wicked-sweet/epic logo to christen our tanks with as we roll ahead into battle, eager to crush our foes! Make sure this insignia contains the [ЯтR] Logo please!

Please contact Msgt. Friend-or-Pho or Capt. Loti if you have any questions