Article L3423-9 of the French Labour Code
When, as a result of a reduction in working hours below the contractual working hours for reasons other than those listed in 1° of Article L. 3423-8, an employee has received, over the course of a month, by way of salary and statutory or contractual allowances for partial deprivation of employment, a total sum lower than the minimum remuneration, he shall be allocated a supplementary allowance equal to the difference…