Maryland Public Safety Section 3-502
§ 3-502.
  (a)   In this section, "police officer" means a member of:
    (1)   a police force of this State or another state;
    (2)   a police force of a county or municipal corporation of this State or another state;
    (3)   the United States Secret Service Uniformed Division;
    (4)   the United States Park Police;
    (5)   the Federal Bureau of Investigation;
    (6)   the Drug Enforcement Administration; or
    (7)   a division of a federal agency the primary duties of which are the investigation, apprehension, or detention of individuals suspected or convicted of federal crimes.
  (b)   A person may not, with fraudulent design on person or property, falsely represent that the person is a police officer, special police officer, sheriff, deputy sheriff, or constable.
  (c)   Except as provided in subsection (e) of this section, a person may not have, use, wear, or display a uniform, shield, button, ornament, badge, identification, or shoulder patch adopted by the Department of State Police to be worn by its members, insignia, or emblem of office, as is worn by a police officer, sheriff, deputy sheriff, or constable.
  (d)   A person may not, for the purpose of deception, have a simulation or imitation of an article described in subsection (c) of this section as is worn by a police officer, sheriff, deputy sheriff, or constable.
  (e)   A person may have, use, wear, or display an article described in subsection (c) of this section with the appropriate authority of:
    (1)   the Secretary of State Police;
    (2)   a police force of another state;
    (3)   the Police Commissioner of Baltimore City;
    (4)   the chief of police of a county or municipal corporation of this State or another state;
    (5)   a sheriff or deputy sheriff;
    (6)   a constable;
    (7)   the United States Secret Service Uniformed Division;
    (8)   the United States Park Police;
    (9)   the Federal Bureau of Investigation;
    (10)   the Drug Enforcement Administration; or
    (11)   a division of a federal agency the primary duties of which are the investigation, apprehension, or detention of individuals suspected or convicted of federal crimes.
  (f)   A person who violates this section is guilty of a misdemeanor and on conviction is subject to imprisonment not exceeding 2 years or a fine not exceeding $2,000 or both.