An order of the ministers responsible for radiation protection and construction defines the conditions under which the technical guidelines for use impose specific requirements on the use of construction products whose activity concentration index (I) is greater than 1, in the absence of a specific study establishing that there is no risk of exceeding the reference level set in Article R. 1333-38.
A methodological guide approved by order of the ministers responsible for radiation protection and construction may specify certain provisions relating to the application of this sub-section.