What is the legal requirement for training in Europe?

Council Directive 2009/104/EC concerning the minimum safety and health requirements for the use of work equipment by workers at work OJ L260/5 Article 9 states: 

"Without prejudice to Article 12 of Directive 89/391/EEC, the employer shall take the measures necessary to ensure that:
(a) workers given the task of using work equipment receive adequate training, including training on any risks which such use may entail;
(b) workers referred to in the second indent of Article 6(b) receive adequate specific training."

Article 6(b) states: "in the case of repairs, modifications, maintenance or servicing, the workers concerned are specifically designated to carry out such work."