I.-Each source of ionising radiation is specifically and appropriately signposted.
II.-Where technical conditions do not allow the source of ionising radiation to be individually signposted, a notice indicating its location and the nature of the risk is displayed at each access point to the zone in question.
III – In the orange or red controlled zones of a basic nuclear installation, where technical conditions do not allow the source of ionising radiation to be individually identified or the signs provided for in II to be put up, an information notice on the conditions of operation is issued to each worker who has to enter these zones. In particular, this notice sets out the applicable safety rules and instructions relating to collective and individual protection measures.