Article R1333-106 of the French Public Health Code
I.-Subject to the provisions of Article R. 1333-107, the following are exempt from the authorisation, registration or declaration provided for in Article L. 1333-8: 1° The possession, manufacture, use, distribution, import and export of radioactive sources and products or devices containing them if the value of the coefficient Q corresponding to the weighted sum of the radionuclide activities present at any time in the place where the activity is carried…