The ONVA is responsible for calculating the duration of holidays and the amount of holiday pay for workers and certain artists as well as the direct or indirect payment of the holiday pay. In the latter case, it provides the various sectoral funds with the data and the financial means required to pay the amounts due. The ONVA has a core mission in what is known as the primary social security network. It guarantees the timely and correct processing of data. With regard to the special funds, it strictly adheres to the legal provisions and is responsible for distributing, in a timely manner, the required data and funds.