Article 706-71-1 of the French Code of Criminal Procedure
Where the use of audiovisual means of telecommunication is possible only with the person’s agreement, the latter shall make known his agreement within five days of being informed of the date of the hearing and the fact that the use of such means is envisaged. Where recourse to such means is not possible because the person refuses, the latter must make his refusal known at the time he is informed…