|The de facto right of many monarchies to override, suspend or otherwise circumvent established laws, generally used sparingly only for dire emergencies.|
The royal prerogative has been called "a notoriously difficult concept to define adequately".
UK passports are issued under Royal prerogative rather than legislation, which meant that it was easy to require UK citizens to give their fingerprints before getting a passport. Royal prerogative has been used as recently as 2005 to remove passports from British citizens on grounds of "public interest".
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