From OpenStreetMap Wiki
|Used on these elements|
|Tools for this tag|
|Status:||Draft (under way)|
|Definition:|| Offices run by some local authority or government authority, often opened to public - local tax office, seat of various ministries, seat of some government agency, various bureaus etc ...
Not town/village hall, courthouse or police, as these have their own tags.
|Rendered as:||Stylized man behind a desk|
amenity=authority name=Ministry of finance
Can be tagges as node or area (building)
Alternatively, this may be taged as amenity=bureau