Every part of any wire, oral, or electronic communication intercepted pursuant to this chapter shall be completely recorded on tape or wire or other comparable device and shall be done in such manner as will protect the recording from editing or other alterations. Immediately upon the expiration of the period of the order, or extensions thereof, such recordings shall be made available to the judge issuing such order and sealed under the judge's directions. Custody of the recordings shall be wherever the judge orders. They shall not be destroyed except upon an order of the issuing or denying judge or a successor and in any event shall be kept for ten years. Duplicate recordings may be made for use or disclosure pursuant to the provisions of section 626A.09 for investigations. The presence of the seal provided for by this subdivision, or a satisfactory explanation for the absence thereof, shall be a prerequisite for the use or disclosure of the contents of any wire, electronic, or oral communication or evidence derived therefrom under section 626A.09.
Applications made and warrants issued under this chapter shall be sealed by the judge. Custody of the applications and orders shall be wherever the judge directs. Such applications and orders shall be disclosed only upon a showing of good cause before a judge of the district court and shall not be destroyed except on order of the issuing or denying judge, and in any event shall be kept for ten years.
When an order for destruction is issued the person directed to destroy such recordings shall do so in the presence of at least one witness not connected with a law enforcement office or agency, all of whom shall execute affidavits setting forth the facts and circumstances thereof. The affidavits shall be filed with and approved by the court having custody of the original warrant and supporting papers.
Any violation of the provisions of this section may be punished as contempt of the issuing or denying judge.