The duration of a preliminary investigation may not exceed two years from the first act of the investigation, including if this act occurred as part of a flagrante delicto investigation.
The preliminary investigation may, however, be extended once for a maximum period of one year on expiry of the period referred to in the first paragraph, with the written authorisation of the Public Prosecutor, giving reasons, which shall be added to the case file.
The investigators complete their operations and transmit the elements of the procedure to the Public Prosecutor pursuant to Article 19 before the expiry of the two-year period or, in the event of an extension, the three-year period, in order to allow either the prosecution to be initiated, where appropriate by the opening of a judicial investigation, or the implementation of an alternative prosecution procedure, or the proceedings to be discontinued. Any investigation carried out after the expiry of these time limits is null and void, unless it concerns a person who has been implicated during the proceedings, within the meaning of Article 75-2, for less than two years or, if extended, three years.
Where the investigation concerns crimes or offences mentioned in articles 706-73 or 706-73-1 or falling within the jurisdiction of the anti-terrorist public prosecutor, the two-year and one-year time limits provided for in this article are extended to three years and two years respectively.
For the purposes of calculating the time limits provided for in this article, the period during which the investigation was suspended shall not be taken into account if the investigation was closed and then resumed by decision of the public prosecutor. In the case of international mutual legal assistance, no account is taken of the time between the signature of the request by the issuing public prosecutor’s office and receipt by that office of the implementing documents. Where several investigations are combined in the course of the same procedure, the date of commencement of the earliest investigation shall be taken into account when calculating the time limits provided for in this article.
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