This list contains the indicative occupational exposure limit values (IOELVs) from Commission Directive 2017/164/EU. Member States are required to bring into force the laws, regulations and administrative provisions necessary to comply with this Directive, which establishes values for reference period of eight-hour time weighted average and for a short-term period of 15 minutes. The Directive adds limit values for 27 new chemical agents, and amends 6 existing ones established by earlier directives.