When the employer envisages modifying an essential element of the employment contract for one of the economic reasons set out in article L. 1233-3, he shall propose this to the employee by registered letter with acknowledgement of receipt.
The letter of notification informs the employee that he has one month from receipt to make known his refusal. The deadline is fifteen days if the company is in receivership or liquidation.
If no reply is received within one month, or within fifteen days if the company is in receivership or compulsory liquidation, the employee is deemed to have accepted the proposed change.