Three Directives have already been enacted to protect workers working under non-standard employment relationships: the Framework Agreement on part-time work concluded by social partners (UNICE, CEEP and the ETUC) - annexed to Council Directive 97/81/EC - protects part-time workers from being treated less favourably than comparable full-time workers and provides that employers should give consideration to requests by workers to transfer from full-time to part-time work or vice-versa; the Framework Agreement on fixed-term work also concluded by social partners (ETUC, UNICE and CEEP) - annexed to Council Directive 1999/70/EC - protects fixed-term workers from being treated less favourably than comparable permanent workers and requires Member States to take measures to prevent abuse arising from the use of successive fixed-term contracts; and Directive 2008/104/EC of the European Parliament and of the Council on temporary agency work establishes equal treatment regarding the essential conditions of work and of employment between temporary agency workers and workers who are directly recruited by the user company.
el Acuerdo marco sobre el trabajo de duración determinada formalizado también por los interlocutores sociales (la CES, la UNICE y el CEEP) - anexo a la Directiva 1999/70/CE del Consejo- protege a los trabajadores con un contrato de duración determinada ante un trato menos favorable que los trabajadores con contrato de duración indefinida comparable y requiere que los Estados miembros adopten medidas a fin de prevenir los abusos derivados de la utilización sucesiva de contratos laborales de duración determinada; y la Directiva 2008/104/CE del Parlamento Europeo y del Consejo sobre las empresas de trabajo temporal establece la igualdad de trato en lo referente a las condiciones esenciales de trabajo y de empleo entre los trabajadores cedidos por empresas de trabajo temporal y los trabajadores contratados directamente por la empresa usuaria.