Gold Usher

The Gold Usher presided over official events of the High Council of Time Lords such as the swearing in of a Lord President of Gallifrey. (TV: The Deadly Assassin)

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)