In order to implement an employee’s right to the leave referred to in Article L. 3142-16, a branch agreement or convention or, failing that, a company agreement or convention shall determine:
1° The maximum duration of the leave ;
2° The number of possible renewals ;
3° The time limits for informing the employer by the employee of the taking of the leave and its renewal, as well as the length of the notice period in the event of the employee’s return before the end of the leave;
4° The deadlines for the employee’s request and the employer’s response regarding the splitting of the leave or its conversion into a period of part-time work.