Emergency session

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The Constitution of the Time Lords clearly stated that when in emergency session, if the members of the Inner Council were unanimous, the President of the Council may be overruled. High Chancellor Flavia and Castellan Jerricho invoked the constitution when they, against the wishes of Lord President Borusa, summoned the Tremas Master to retrieve the Doctor from the Death Zone. (TV: The Five Doctors)

On the final day of the Last Great Time War, the High Council of Time Lords met in an emergency session. The Eleventh General was informed of this by Androgar but dismissed it, noting that their plans had already failed. (TV: The End of Time, TV: The Day of the Doctor)

In the 2000s, the United Nations met in an emergency session to discuss the approach of the Moon towards Earth. (TV: The Lost Boy)