Article 706-148 of the French Code of Criminal Procedure
If the investigation relates to an offence punishable by at least five years’ imprisonment, the liberty and custody judge may, at the request of the public prosecutor, order by reasoned decision the seizure, at the advanced expense of the Treasury, of the property for which confiscation is provided pursuant to the fifth and sixth paragraphs of article 131-21 of the Criminal Code when the law punishing the crime or offence…