; and (B) the sentencing court, the United States attorney, and the Federal Public Defender or Executive Director of the Community Defender Organization for the judicial district in which the sentence described in this paragraph was imposed. (2) Application (A) In general An application for a sentence reduction under this section shall be filed in the judicial district in which the sentence was imposed as a motion to reduce the sentence of the defendant pursuant to this section and may include affidavits or other written material. (B) Requirement A motion to reduce a sentence under this section shall be filed with the sentencing court and a copy shall be served on the United States attorney for the judicial district in which the sentence was imposed. (3) Expanding the record