Article L1251-60 of the French Labour Code
Legal persons governed by public law may call upon the employees of these companies for non-permanent tasks, known as missions, in the following cases only: 1° Temporary replacement of a member of staff due to sick leave, maternity leave, parental leave or parental presence leave, temporary part-time work, participation in activities as part of an operational, health, civil or other reserve, or performance of civil or national service, recall or…