authorization
noun
(UK also authorisation) uk/ˌɔːθəraɪˈzeɪʃən/ us [ C or U ]
official permission for something to happen, or the action of giving someone official permission for something:
get/acquire/obtain authorization Human Resources must obtain specific authorization from the Executive Director before any candidate can be rehired or transferred.
give/grant/provide authorization
authorization to do sth Union members have an authorization to strike if a deal cannot be reached over the contract dispute.
[ C ] LAW
an official document that shows someone has permission to do something:
Air tour companies will be required to get an authorization from the FAA to operate.