Article D4622-14 of the French Labour Code
Undertakings and establishments which are not covered by an autonomous occupational health and prevention service pursuant to section 2 shall organise or join an inter-company occupational health and prevention service. However, a company or establishment, regardless of its workforce, may have its employees monitored by a company occupational health and prevention service in the following cases: 1° The company or establishment belongs to a group within the meaning of article…