The DEPUTY PRESIDENT: I have received a letter from Senator Fifield proposing that a definite matter of public importance be submitted to the Senate for discussion, namely: The Gillard Government's plan to damage business and consumer confidence through the introduction of a carbon tax. I call upon those senators who approve of the proposed discussion to rise in their places. More than the number of senators required by the standing orders having risen in their places— The DEPUTY PRESIDENT: I understand that informal arrangements have been made to allocate specific times to each of the speakers in today’s debate. With the concurrence of the Senate, I shall ask the clerks to set the clock accordingly.