CEVAP:

Official sources are the legal sources of labour law that are adopted by the competent authorities with legislative power. The official sources consist of the Constitution, statues, by-laws and other legislative instruments of minor significance in the field of labour law such as regulations.

The private sources refer to the binding sources that are unique to labour law. Accordingly, collective labour agreements, individual employment contracts, internal regulations, establishment practices and employer’s right of direction constitute the scope of the private sources.