A joint order by the Ministers for Labour and Agriculture determines:
1° The industrial radiology equipment referred to in Article R. 4451-61, taking into account the nature of the activity carried out, the characteristics and, where applicable, the methods of use of the equipment;
2° The content and duration of the training of workers called upon to handle this equipment, taking into account the nature of the activity carried out and the characteristics of the equipment used;
3° The qualifications of the persons responsible for the training;
4° The methods of testing knowledge and the conditions for issuing the certificate of aptitude;
5° The period of validity of this certificate and the conditions for its renewal.