"Octanex holds residual rights in each of the permits in the form of discovery payments and a 1% royalty over any production from the permits, as well as right of re-conveyance."
http://www.asx.com.au/asxpdf/20121016/pdf/429dnts8mry8md.pdf
Not exactly sure how it's calculated (or whether there has already been an agreement as to the exact amount), but we may see an announcement from Octanex if the "discovery payment" is material enough.
