operational update, page-37

Excellent announcement today, alot of people have been worried about the way SSN seemed to be going over the past few weeks and then Terry puls this out of his hat!!
No doubts from me, he knows whats hes doing. We just need to let him go about his business, I'm sure that he has heaps on his plate at the moment.
This may seem like a stupid question but how does the working interest work out? If this is on our land, how come a small interest? Or is this to do with how much cash with have to kick in?

Thanks