Article L227-9-1 of the French Commercial code
The shareholders may appoint one or more statutory auditors under the conditions provided for in Article L. 227-9. At least one statutory auditor must be appointed by simplified joint stock companies which, at the close of a financial year, exceed two of the following thresholds, set by decree: their balance sheet total, the amount of their turnover excluding tax or the average number of their employees during the financial year….