Article 1799 of the French General Tax Code
Shall be punished by the penalties applicable to the principal offender: 1° Any person convicted of having facilitated the fraud or knowingly procured the means to commit it; 2° Any person convicted of having knowingly formed or allowed to be formed, with a view to fraud, in the properties or premises of which he has the enjoyment, clandestine deposits of objects, products or goods subject to the duties or regulations…