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If you work in the technical field of radiation protection (e.g. operating X-ray equipment or handling radioactive substances), you must provide proof of the necessary specialist knowledge. You can apply for this from the competent authority.
If you intend to operate X-ray equipment or handle radioactive substances, you will need a certificate of competence from the competent authority for radiation protection as proof of the specialist knowledge you have acquired.
To do this, you must first successfully complete a recognized course to acquire the specialist knowledge. You can then apply for a certificate of specialist knowledge with additional documents.
If you wish to inspect, test, maintain or repair X-ray equipment or sources of interference on a commercial basis or employ persons for this purpose, you must notify the competent authority before commencing the activity.