prerogative
n. C / Un. a special right or power that only a specific person or group has. It is often used to describe a choice that you alone are allowed to make.
n. an exclusive right, privilege, or power held by a specific person, office, or social class. Often refers to a discretionary power that is not subject to external challenge.
It is the manager's prerogative to change the team schedule.
While the board makes suggestions, the final decision on hiring remains the CEO's prerogative.
In many constitutional monarchies, the royal prerogative has been largely transferred to elected officials, though it remains a symbolic cornerstone of state authority.
From Anglo-Norman prerogative (noun), from Latin praerogātīva (“previous verdict; claim, privilege”), noun use of the feminine singular of praerogātīvus (“having first vote; privileged”).
Often used in the phrase 'it is someone's prerogative to [verb]'.