Recourse to overtime is limited to the following exceptions:
- to prevent the loss of perishable materials or ensure that the technical results of work are not compromised;
- to facilitate special work (for the preparation of inventories or balance sheets, due dates, liquidations and statements of accounts);
- in exceptional cases which arise by virtue of the public interest and in the case of events that involve a national danger;
- for works undertaken with a view to responding to an accident that has occurred or is imminent;
- for urgent works to avoid a serious disruption of the establishment’s normal operations.