Where the investigative measure requested is not provided for in this Code or where it could not be carried out under a similar national procedure, the magistrate hearing the case shall, wherever possible, have recourse to any other investigative measure that makes it possible to obtain the information requested by the issuing authority.
However, subject to the provisions of Article 694-31 and Article 694-34, it must always grant the requests provided for in Article 694-33.
The magistrate hearing the case may also order another investigative measure than the one requested if it allows the same result to be obtained in a less intrusive manner.
He shall inform the issuing authority without delay of decisions taken pursuant to this Article, including where no measure can be substituted for the measure requested.