Senator SINGH (Tasmania) (14:05): Mr President, I ask a supplementary question. We would invite the government to join us in ensuring that an emissions trading scheme starts in this country— The PRESIDENT: The question, Senator Singh. Senator SINGH: I refer to the commitment made by the Prime Minister's parliamentary secretary, Mr Frydenberg, on 26 March this year: … genuinely consult with those parties who are most affected by any new regulation. Can the minister outline the consultation process on the government's price pass-through mechanism?