There really aren't too many rules about your Evran or its page.
Page: Just make sure that its on a child safe site, among creatures that won't mind it. I'm really not strict about when you should have your Evran's page up. I usually give two weeks or more before placing it up for sale again. If I do not state how long you have when you buy, assume you have two weeks. Oh, and your Evran's general stats should be on its page. Feel free to add a personality, history, etc. to them.
Name: Please think of a creative name for your Evran, nothing common or human like "Spot" or "Joe." The name must NOT be Elvish. Sorry about this, but Evranae seem to have trouble understanding the Elvish language for some reason... conflicting magic or something like that. It's never been well studied.
Copyright: Please do not take credit for or redistribute the Evranae.
Linking:Text links are fine, or you can use a banner.
You can link back to: http://www.angelfire.com/realm2/ladybirdz/myadoption/evranae.html
Here are some banners that you can save and use to link back.