reg 4
The remaining ALs in Part 2 are defined physical quantities related to the direct biophysical effects of exposure to electromagnetic fields. Employers may, as part of their exposure assessment, assess electromagnetic field levels against these ALs. Each AL table states which ELV or ELVs will be complied with if electromagnetic field levels at a particular frequency do not exceed the specified AL. Exposure to electromagnetic field levels that exceeds an AL may still be below the relevant ELV, but in order to determine this the employer will need to undertake a further assessment under regulation 6.