Maryland Business Occupations and Professions Section 13-401
§ 13-401.
  (a)   Except as provided under subsection (b) of this section, an individual shall be certified by the Secretary as a private detective before the individual personally may provide any private detective service in the State.
  (b)   An individual who is not certified as a private detective may provide private detective services in the State if:
    (1)   the individual is employed by or has applied for employment with a licensed private detective agency;
    (2)   the licensed private detective agency has submitted to the Secretary the application of the individual for certification as a private detective, fingerprint cards, and fees required under § 13-403 of this subtitle;
    (3)   after a preliminary background investigation, the Secretary determines that the provision of private detective services by the individual would not result in a potential threat to public safety; and
    (4)   the Secretary has not denied the application.