Abstract Editorial Executive summary 1. Introduction 2. Scope of this advice 3. Objectives of protection in emergency exposure situations 4. Protection of emergency workers 5 Description of emergency exposure situations 6 Applying the Commission's System to emergency exposure situations 7. Arrangements for emergency exposure situations 8. Implementing protection strategies 9. Transition to rehabilitation References Annexes: A. Assessment of the contribution of different exposure pathways to the residual dose B. Characteristics of selected individual urgent protective measures C. Specific guidance for the termination of protective measures ADDITIONAL MATERIAL The history of ICRP and the evolution of its policies by Jack Valentin and Roger Clarke