9.3.5 Occupational And General-Public Exposure

ICNIRP specifies separate restrictions for occupationally exposed people and members of the general public.

Occupational restrictions apply to adults exposed under controlled conditions as part of their work. They must be trained to recognize RF hazards, able to apply appropriate risk controls, and covered by a suitable health and safety program. Employment alone does not make the occupational restrictions applicable.

General-public restrictions apply to people of all ages and health conditions who may have no knowledge of, or control over, their exposure. ICNIRP also applies the general-public restrictions to fetal exposure. The more restrictive public limits reflect the broader population and the absence of assured training and control; they do not imply that compliant occupational exposure is expected to cause harm.

9.3.6 Reduction Factors And Conservative Assumptions

ICNIRP first identifies an adverse-health-effect threshold or, where necessary, an operational threshold derived from related scientific knowledge. It then applies reduction factors to establish the basic restrictions.

The reduction factors account for biological variability, differences in baseline and environmental conditions, uncertainty in dosimetry, and uncertainty in the health evidence. Further conservatism is introduced through the exposure scenarios and the derivation of reference levels. The resulting protection cannot therefore be represented by one universal safety-margin number.

The restrictions are set below the exposure levels associated with substantiated adverse health effects. Compliance decisions must nevertheless follow the applicable basic restrictions, reference levels, averaging rules, and assessment procedures rather than attempting to infer safety from a simple ratio to a single limit.