Article D8233-1 of the French Labour Code
The employee is informed of the legal action envisaged by the representative trade union organisation in application of article L. 8233-1 by any means conferring a date certain. This information specifies the nature and purpose of the action envisaged by the trade union organisation and indicates that : 1° The employee may inform the trade union organisation of his opposition to the planned action within a period of fifteen days…