# Courts and Judicial Proceedings (GCJ)

## Title 10. Evidence

### Subtitle 4B. Pen Registers and Trap and Trace Devices

#### Section 10-4B-03

(a) An investigative or law enforcement officer may make application for an order or an extension of an order under Sec. 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.

---

Md. Code Ann., Cts. & Jud. Proc. (as displayed at mgaleg.maryland.gov, October 16, 2026)