Five World Prime Minister

Five World Prime Minister or Prime Minister of the Five Worlds (and apparently also President) was the position created in the Corellian system to replace the hated post of governor-general, which had been established by the New Republic and was removed by the Galactic Alliance several years after the Yuuzhan Vong War.

The duties of the office included representing the Corellian system in negotiations with outside representatives, and helping coordinate the finances, resources, and policies of the Five Brothers, each of which had their own Head of State that was appointed separately from the Prime Minister.

The relation of the Prime Minister to the lesser Ministers is ambiguous; Thrackan Sal-Solo, Head of State of Corellia, managed to evict and replace the Minister of War apparently without the current Prime Minister's approval, and the position of the Prime Minister was defined as the head of a "coalition" of politicians, each which wanted to assume the position.

The Prime Minister was addressed as "Your Excellency" or "Minister"/"Madame Minister," and lived in the Prime Minister's Residence.

The first Five World Prime Minister was Aidel Saxan, who had been in office at least a year prior to the start of the Second Corellian Insurrection. When she was assassinated in 40 ABY, her ex-husband, Denjax Teppler, was sworn in as interim Prime Minister.

Shortly later he was apparently replaced in favor of Thrackan Sal-Solo, who himself was replaced by Dur Gejjen after the former's assassination.

Behind the scenes
In Betrayal, the government of the Corellian system is the Prime Minister, while the heads of the individual planets are Heads of State. The end of the book also implies that Head of State Thrackan will attempt a bid at the Prime Ministership from Teppler.

Bloodlines mentions neither the Prime Ministership or Teppler, and still lists Sal-Solo as Head of State in the character listing. However, in the novel itself he is called "President" and is shown as being the head of the full Corellian government.

Presumably this is due to editing oversights and the fact that Bloodlines was finished before Betrayal. Presumably, Sal-Solo (and later Gejjen) hold the Prime Ministership, as well as Head of State of Corellia; this is not totally out of possibility, as in Betrayal Sal-Solo was both Corellian planetary Head of State as well as Minister of War to the Prime Minister.