Article L813-12 of the French Code governing the entry and residence of foreign nationals and the right of asylum
The measures of restraint applied to foreign nationals detained pursuant to article L. 813-1 are strictly proportionate to the need for verification operations and for keeping them at the disposal of the judicial police officer.Foreign nationals may only be handcuffed or shackled if they are considered to be either dangerous to others or to themselves, or likely to attempt to abscond.