Commentaries: Art. 61

In occupationally exposed persons, radiation exposure must be determined individually in accordance with Annex 4 (individual monitoring).
External exposure must be determined every month.
The supervisory authority may grant exemptions from paragraphs 1 and 2 if:
1. an additional or another appropriate dose monitoring system is available;
2. no appropriate dose monitoring system is available, but enhanced radiological protection measures are taken.
The FDHA shall specify, in consultation with ENSI, how and at what intervals internal radiation exposure is to be determined. In doing so, it shall take into account the working conditions and the type of radionuclides used.
It shall specify, in consultation with ENSI, when a second, independent dosimetry system fulfilling an additional function must be used.