If you want to have external companies intervene within the laboratory, you must first send them a prevention plan and a safety protocol. This ensures that the company's intervention is carried out safely. In case of accident because of the company, the laboratory will be protected.
Another link for the prevention plan: https://intranet.cnrs.fr/prevention_securite/notes/procedures/Pages/Intervention_Entreprises.aspx|Prevention Plan for External Interventions https://intranet.cnrs.fr/prevention_securite/appli/Documents/Plan_de_Prevention-Guide_utilisateurs.pdf#search=INSPECTION%20COMMUNE