The provisions of this chapter apply whenever workers are exposed to a relative pressure of more than 100 hectopascals in the course of the following activities carried out with or without immersion:
1° Hyperbaric work carried out by companies subject to certification, the list of which is set by the order provided for in Article R. 4461-48, taking into account the nature and extent of the risk, including in particular industrial, civil engineering or maritime work ;
2° Work in a hyperbaric environment carried out for purposes other than those mentioned in 1°, in particular in the context of physical or sporting, cultural, scientific, technical, maritime, aquacultural, health, safety and rescue activities.