Article L3142-113 of the French Labour Code
In undertakings with less than three hundred employees, the employer may refuse the leave or the change to part-time work: 1° If, after consulting the Social and Economic Committee, the employer considers that the leave or the period of part-time work will have a detrimental effect on the smooth running of the company; 2° If the employee requests this leave or this period of part-time work less than three years…