The National Occupations Classification (known as COR) is a legal act which defines the six digit codes assigned to each job position, with job positions clustered by occupational sectors. It is mandatory for each employee in Romania to be assigned a so-called COR code, which is also included in the employment contract.

With the ever-growing number of new occupations, the COR is periodically reviewed and amended, hence the recent need to supplement it with 28 new occupations as well as to amend names of 5 existing occupations.