(a) An investigative or law enforcement officer may make application for an order or an extension of an order under § 10-4B-04 of this subtitle authorizing or approving the installation and use of a pen register or a trap and trace device, in writing, under oath or equivalent affirmation, to a court of competent jurisdiction of this State. (b) An application under subsection (a) of this section shall include: (1) The identity of the State law enforcement or investigative officer making the application and the identity of the law enforcement agency conducting the investigation; and (2) A statement under oath by the applicant that the information likely to be obtained is relevant to an ongoing criminal investigation being conducted by that agency.
Maryland Legal Code