Working hours temporarily may be rearranged, provided the employment contracts or any applicable collective labour agreement allow sufficient flexibility. Such adjustments fall within the employer’s managerial authority as long as they are reasonable, time-limited, and the agreed working time is ultimately met. Mandatory provisions of the Labour Act, in particular maximum working hours and minimum rest periods, must always be respected. Employees cannot be forced to take time off (resp. vacation ), but the employer may allow or require the use of flexitime, grant time off in lieu, or voluntarily grant paid or unpaid leave.