In companies with fewer than fifty employees, the employer notifies the employee of the redundancy for economic reasons by registered letter with acknowledgement of receipt.
The letter of notification may not be sent before the expiry of a period starting from the notification of the proposed redundancy to the administrative authority.
This period may not be less than thirty days.
A collective bargaining agreement may provide for more favourable deadlines for employees.
In undertakings with fifty or more employees, where the proposed redundancy concerns ten or more employees within the same thirty-day period, the employer shall notify the redundancy in accordance with the procedures set out in the first paragraph of this article, after notification by the administrative authority of the validation decision referred to in article L. 1233-57-2 or the approval decision referred to in article L. 1233-57-3, or on expiry of the periods set out in article L. 1233-57-4.
He may not, on pain of nullity, terminate the employment contracts before notification of this approval or validation decision or the expiry of the periods provided for in article L. 1233-57-4.