There is no information at the moment on how to apply, because there is nothing to apply for. However as said above, they are working on a recruitment model and recruiting recruiters (deadline end of month), how far down the list of things to do it sits is unknown for now, but sitting on the inside, I would be surprised if there was not something this winter.
But the official line is we are correctly crewed for next year, so dont shoot me if nothing happens this year!
Another option is that they bring some more of our Canadian friends over next summer, but dont get me started on that!!