Maryland Statutes
Subtitle 4 - Certification of Private Detectives
Section 13-407 - Use of Private Detective Certification Cards

(a)    At any time that a certified private detective provides a private detective service, the private detective shall carry the certification card issued under § 13-406 of this subtitle.
    (b)    On request of a law enforcement officer, a certified private detective shall show the private detective’s certification card.