When, in the light of the results of individual dosimetric monitoring, the exposure of a worker has exceeded one of the dose limit values set in Article R. 4451-6, the Institut de Radioprotection et de Sûreté Nucléaire shall immediately inform the employer, the Minister for Labour, the Autorité de Sûreté Nucléaire or the delegate for nuclear safety and radiation protection for defence-related installations and activities.