The President of the Council led the Time Lords when their power was being depleted by Omega. While the identity of the aggressor was unknown, the President decided to use the last of their power to summon the Doctor's first two incarnations to help the current third incarnation to resolve this crisis.
His decision to break the Laws of Time met with criticism from his Chancellor, but the President had faith in his gamble since the Time Lords didn't have any better solution since the energy drain was difficult for them to sort out.
After this gamble proved successful, the Time Lords rescinded the Third Doctor's exile on Earth and restored his ability to travel through time and space. (TV: The Three Doctors)
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