Article 3 Definitions
1. For the purposes of this Directive:
(a) "worker" means any person who, in the Member State concerned, is protected as a worker under national employment law;
(b) "temporary-work agency" means any natural or legal person who, in compliance with national law, concludes contracts of employment or employment relationships with temporary agency workers in order to assign them to user undertakings to work there temporarily under their supervision and direction;
(c) "temporary agency worker" means a worker with a contract of employment or an employment relationship with a temporary-work agency with a view to being assigned to a user undertaking to work temporarily under its supervision and direction;
(d) "user undertaking" means any natural or legal person for whom and under the supervision and direction of whom a temporary agency worker works temporarily;