Article D1453-2-13 of the French Labour Code
The hours spent by an employee exercising his professional activity outside any establishment, with the exception of the employees mentioned in article D. 1453-2-11, exercising trade union defence functions are considered, within the limit of ten hours per month mentioned in article L. 1453-5, as working hours and are paid as such by the employer. The employer is reimbursed in full under the conditions set out in article D. 1453-2-10.