In accordance with the CERN Staff Rules and Regulations – Changes in financial benefits :

* V 1.38 Obligation to furnish information

Members of the personnel shall declare the following to the Organization, in writing and within 30 calendar days:

1. any change in their personal status or that of members of their family;
2. the cessation of full-time studies or the taking-up of employment by any of their dependent children (impact on CERN family access cards and Host State documents).