Me. Rev. Stat. tit. 15, § 3303

On motion made by or on behalf of a juvenile, or by the court itself, a petition must be dismissed with prejudice if it was not filed within 9 months from the date the juvenile was referred to the juvenile community corrections officer for an intake assessment, unless the prosecuting attorney either before or after the expiration of the 9-month period files a motion for an extension of time for the filing of a petition, accompanied by the reasons for this extension. The court may for good cause extend the time for bringing a petition for any period of time that is less than the limitation established in section 3105‑A.