When the staff announce it on the womjr.com main page, the /contest realm will be open to all players. This realm is basically like your own personal one, except that you are only Build, and are rendered unable to use any commands Advanced and higher. As soon as you start building on your contest realm, you've instantly become a participant.

When you're done, just post your completed form on the contest thread. No pictures needed. Just the completed form.

PS. To visit other people's contest realms, type /contest (playername)
The contest realm will only be open during OFFICIAL contests.