In order to implement an employee’s entitlement to the leave referred to in Article L. 3142-125, a collective agreement determines :
1° The maximum duration of the leave or period of part-time work;
2° The number of times the leave or period may be renewed;
3° The length of service required to be entitled to the leave or period;
4° The deadlines by which the employee must inform the employer of the date on which he/she wishes to take leave or, in the event of a change to part-time working, of the starting date of the period of part-time working and the extent of the desired reduction in his/her working time, as well as the envisaged duration of this leave or period;
5° The conditions and deadlines for the request to extend this leave or this period of part-time work;
6° The conditions under which the employee informs the employer of his intention to continue or terminate his employment contract at the end of his leave or his period of part-time work;
7° The ceilings or levels mentioned in Articles L. 3142-127 and L. 3142-128;
8° The conditions for maintaining a link between the company and the employee for the duration of the leave and, where applicable, the arrangements for support and professional readaptation on his return.