Quote Originally Posted by IzumiYuki View Post
People used to be able to queue with a full premade even if one member has a lockout.

They changed it some time ago (a few patches before 2.4). If someone in the party has a lockout, even if it's a full premade, they won't be able to queue.
This was 2.3. They did it to stop premades from exiting and re-entering the duty roulette until they get a favorable duty. This also added the 30min penalty on the first person to leave a roulette even if it's a premade party.