Some countries and sub-national jurisdictions require a license or permit in order to do business as a street artist.
Without legal authorization, artists run the risk of being fined or arrested by the police if municipal ordinances prohibit their activities.
For graffiti artists and muralists, part of the experience may be finding a suitable wall, permitted or not.
In some municipalities, artists may apply for a license that allows them to legally occupy public space or a permit to paint a building.
San Francisco, Berkeley, and Seattle are American cities that regulate the display and trade of artists selling their wares on the street.