President of the Senate (Australia)
The position is provided for by Section 17 of the Constitution of Australia. The Senate elects one of its members as president at the start of each new term, or whenever the position is vacant. This is usually—though not necessarily—a member of the party or coalition that holds the most seats in the Senate. The largest party in the Senate is not always the governing party, as government is determined by the House of Representatives. The President of the Senate and the Speaker of the House of Representatives may consequently be from different parties.
Cabinet of Australia
The Parliamentary Business Committee (PBC) considers priorities for the Australian Government's legislation program and requests to the Prime Minister for the presentation of ministerial statements. Decisions of the PBC do not require the endorsement of the Cabinet. The PBC is chaired by the Leader of the House with the Leader of the Government in the Senate as deputy chair and includes Manager of Government Business in the Senate, the Deputy Leader of the House, and the Assistant Minister to the Prime Minister.