Ann: Hawsons Signs Binding Agreement with Flinders Ports, page-75

You may want to check your sources, the quote I read doesn't quite match up with your interpretation! This is from the PFS release, 28 July 2017:

“This successful prefeasibility study delivers an attractive development case for Hawsons under long-term iron ore price forecasts, and importantly a cost structure in the first quartile of the global iron ore cost curve that means cash flow is likely sustainable through the commodity cycle. These results substantially lift the investment grade and the strategic value of the project,” Mr Hill said.

And now the BFS is suggesting it isn't sustainable in the current conditions, which is why they've paused it.