Do I need an authorisation to work in the street (in France) ?
Last year, the Malraux law was that any artist could work in the street. Henna tattoo as we do it is not qualified as artistic, except if you can tattoo without using tracing paper. I recommend you to check prior with the city hall or the police. Once in Nice, they allowed it only on the cost boulevard, the Promenade des Anglais but nowhere else .