Hiring implies a tripartite relationship. The employee is employed by his or hers employer,  while the actual work is performed under the direction of another undertaking.  

Between the employee and the employer (Undertaking A), there is a regular employment relationship, regulated by labour law regulation, including the Working Environment Act. Between Company A and Company B, there is a contractual relationship between two companies. Such agreements are not regulated by labor law but are governed by general contract law.

The Working Environment Act distinguishes between hiring from an undertaking whose object is to hire out labour (temporary work agency) and an undertaking whose object is not to hire out labour (production company). Different rules apply depending on whether the hiring is from a temporary work agency or a production company.

Guide on the Rules for Hiring Labor

The Ministry of Labor and Social Inclusion has created guidelines on the regulations onr hiring labor in Norway, which provides an overview of the regulations and guidance on how they should be understood. The guidelines is intended for companies, employees, union representatives, supervisory authorities, and others who need to relate to the regulations in various contexts.