I believe Senator Brockman has more questions, in this regard, so perhaps I won't dwell on it. I want to return to the resources sector. I listened carefully when you spoke earlier about not disclosing the detail of the modelling. However, I've had consultation with a number of the 215 emitters who tell me that whilst they have a program to reduce emissions over the medium turn they will not meet the targets by 2030. When they've raised this in consultation with the department, they've been told they will just have to pay the penalty. Has there been modelling done by the department that would provide information on the budgetary impact of that?