The group that authorizes changes that must be installed faster than the normal process is called the?

The ECAB is the formally defined group in ITIL responsible for evaluating and authorizing emergency changes that must be implemented faster than the normal CAB process allows. It is typically a smaller, on-call subset of the full CAB, convened rapidly with only the stakeholders required for the specific emergency. This is the official ITIL terminology and it is distinct from the regular CAB cycle.

'Urgent Change Authority (UCA)' is not a defined role or body in the ITIL framework - this term is fabricated and does not appear in ITIL change management.

'Urgent Change Board (UCB)' is not an ITIL-defined group - this term does not exist within the ITIL change management process vocabulary.

'CAB Emergency Committee (CAB/EC)' is not the correct ITIL terminology - while superficially plausible, the official and only recognized term for this body in ITIL is ECAB.