Article A322-97 of the French Sports Code
In addition to the equipment listed in article A. 322-78, the organisation of a dive using trimix or heliox mix requires the presence of the following equipment at the launch or immersion site: -a weighted descent and ascent line which may also be used for decompression; -a copy of the planned dive schedule(s); -logistical support or a practice support boat with an authorised person on the surface to manoeuvre it.