For the purposes of investigating and establishing the offences referred to in Article 706-26, the visits, searches and seizures provided for by Article 59 may be carried out outside the hours provided for by this article inside premises where narcotics are used in company or where narcotics are manufactured, processed or stored unlawfully when these are not residential premises.
The acts provided for in this article may not, on pain of nullity, have any purpose other than the investigation and establishment of the offences referred to in article 706-26.