The National Classification of Occupations (the COR) is a normative act that includes codes that are to be assigned to each job and is divided by occupational families. The assignment of a COR code to each employee is mandatory. The Labour Code requires that each individual employment agreement should state the COR code for the job that the employee will perform. The COR is revised periodically, yet still there are occupations that are not included, and employers need to assign the COR code for the most similar occupation.