Not many, but they should be taken into account.
1. You have to like Pirates of the Caribbean.
2. You don't need to have a website.
3. In case you do have a website, make sure to put up a code (text or graphic) on your site before you apply. We'll still list you if we can't find the code, but without your site link.
4. Fill out the joining form completely and correctly, especially the e-mail address as you can't join without one.
5. You will receive a reply saying when you are listed. Your information will be posted within the next update.
Easy enough? Go grab a code.