The rule regarding transferring at origin points is in the very first paragraphs under application & carriers.

It's a bit of confusing IATA speak (like a lot of fares) but basically they're saying that while it's okay to go beyond your start point or to go further than a true round the world you can't actually go through your start point.
Or at least that's how we were advised that's how it went when I was on the Star desk at AN. I personally wouldn't ever allow a ticket with a routing like that to be issued as per the application paragraph rule, but if you can get it done, then go for it!