 The leaders of the council's "çavuş" were titled "çavuşbaşı" / (or "başçavuş" / ).The çavuşbaşı was an assistant (or deputy) to the Grand Vizier, dealing with security matters, accompanying ambassadors visiting the Grand Vizier, and also carried out the first examination of petitions submitted to the Council, and led council meetings when the Grand Vizier was not present.The title has its origin in Uyghur use, where it was the title of ambassadors, and then entered Seljuq use for Byzantine imperial messengers, and Persian and Arabic use for various court attendants.