Whether the costs are charged by the operator in advance or...

Whether the costs are charged by the operator in advance or arrears seems to vary. MRO invoices in arrears but, then, MRO is a different kind of animal and the fields in which AUT participates are more mature and producing a lot of cash flow. It would not surprise me if much of the cost is paid in advance but I could be wrong. The Frac will account for a very significant proportion of the costs and this one (24 stage if I remember correctly) is big.

I don't see the necessity for a CR yet but it obviously depends on what else they are about to do.