Article L3142-14 of the French Labour Code
In order to implement an employee’s entitlement to the leave referred to in Article L. 3142-6, a company collective agreement or agreement or, failing that, a branch agreement or agreement shall determine: 1° The maximum duration of the leave ; 2° The number of times the leave may be renewed ; 3° The conditions under which the leave may be split up or converted into a period of part-time work;…