Article L3123-32 of the French Labour Code
Decrees shall determine the conditions of application of this Section either for all professions or branches of activity or for a particular profession or branch. If, in an occupation or branch, the practice of part-time work causes a serious and lasting imbalance in conditions of employment, decrees, issued after consultation with the employers’ and employees’ organisations concerned, may introduce limitations on the use of such practice in the branch or…