It's simple! The only two things that need to be true are:
If those two things are true then all you need to do is:
If you want to write an article that you feel might be interesting or beneficial to Utatans or have a special project you want published (and don't mind being edited!) read about special project submissions.
First thing to do is check out the themes!
If you want to participate, you may need to join the flickr group or get a Utata member page.
There are some general project guidelines you should read.