Machines exhibited at trade fairs in Germany must meet the requirements set by the transposition into German law of the Machinery Directive (2006/42/EC) in terms of their construction and equipment. Exhibits without a CE mark must display a clearly readable sign indicating that they do not meet the requirements of European product safety law and cannot be purchased in EEA countries until conformity with the relevant regulations has been established. In addition, regulations on occupational health and safety concerning the operation of machinery and equipment, the German Occupational Safety and Health Act (Arbeitsschutzgesetz), and the German Ordinance on Industrial Safety and Health (Betriebssicherheitsverordnung) must be complied with.