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.
Speaker of the Australian House of Representatives
The office of Speaker is currently held by Tony Smith (Liberal) since 10 August 2015. The Deputy Speaker is Kevin Hogan (National), who was elected Deputy Speaker on 26 March 2018. If the Speaker is absent the Deputy Speaker becomes the Acting Speaker. The Second Deputy Speaker is Rob Mitchell (Labor).