Article R4461-6 of the French Labour Code
The procedures, and their parameters, adopted for the various methods of intervention or performance of work are set by joint orders of the Minister for Labour and, each in their respective areas of responsibility, the ministers concerned. Each order specifies in particular: 1° The breathing gases or gas mixtures authorised, in application of the provisions of sub-section 2 below; 2° The duration of intervention or performance of the work, taking…