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.
Father of the Australian Parliament
In Australian parliamentary practice, the Father of the Australian Parliament is the more senior of the Father of the Senate and the Father of the House of Representatives. It is an informal, honorific title which carries no parliamentary responsibilities. Where two or more parliamentarians have had equal lengths of continuous service, more than any other currently serving parliamentarian, they are known as the joint Fathers of the Parliament. The current Father of the Parliament is Senator Ian Macdonald who has held the title since 10 May 2016.