Do we need a legal definition for "nanomaterials" in occupational health and safety regulation?

Based on an addition to the European Chemicals Regulation REACH , special test and information requirements for registration will apply to nanoforms of substances from 2020. This regulation is based on a proposal by the EU Commission for a definition of the term "nanomaterials", which aims to ensure uniform application in various legal areas. 

For occupational health and safety law, however, the BAuA sees no need to define and regulate nanomaterials as a single group. 

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