Gold Usher

The Gold Usher regulated debates in the High Council. (PROSE: Lungbarrow) They also presided over official events such as the swearing in of a Lord President of Gallifrey (TV: The Deadly Assassin) and the Lord Chancellor. (AUDIO: Pandora)

They formally introduced the President-elect to the Matrix, asked the Council if anyone would contest the candidate's right to the office and, eventually, they invested the President and provided to him/her the items of Rassilon. (TV: The Invasion of Time)

History
A Gold Usher was with the Lord President on Presidential Resignation Day when he was assassinated by Goth. The assassination kept the identity of the President's successor a secret. (TV: The Deadly Assassin)

A Gold Usher invested the Fourth Doctor as President of the Supreme Council of the Time Lords of Gallifrey. He handed the Doctor the Rod of Rassilon and the Sash of Rassilon and introduced his mind to the Matrix. When the Matrix appeared to reject the Doctor and attack him, the Gold Usher argued the legality of this induction with Chancellor Borusa. (TV: The Invasion of Time)

A Gold Usher opened the doors to the Panopticon on Chancellor Jerasta's command. (AUDIO: Songs of Love)

Parallel universe
In a parallel universe, a Gold Usher invested the Doctor as president in a fantasy. (AUDIO: Auld Mortality)