Maryland Code, Criminal Law § 4-101

(a)(1) In this section the following words have the meanings indicated.

(2) “Nunchaku” means a device constructed of two pieces of any substance, including wood, metal, or plastic, connected by any chain, rope, leather, or other flexible material not exceeding 24 inches in length.

(4) “Star knife” means a device used as a throwing weapon, consisting of several sharp or pointed blades arrayed as radially disposed arms about a central disk.

(1) an officer of the State, or of any county or municipal corporation of the State, who is entitled or required to carry the weapon as part of the officer's official equipment, or by any conservator of the peace, who is entitled or required to carry the weapon as part of the conservator's official equipment, or by any officer or conservator of the peace of another state who is temporarily in this State;

(2) a special agent of a railroad;

(3) a holder of a permit to carry a handgun issued under Title 5, Subtitle 3 of the Public Safety Article; or

(4) an individual who carries the weapon as a reasonable precaution against apprehended danger, subject to the right of the court in an action arising under this section to judge the reasonableness of the carrying of the weapon, and the proper occasion for carrying it, under the evidence in the case.

(c)(1) A person may not wear or carry a dangerous weapon of any kind concealed on or about the person.

(2) A person may not wear or carry a dangerous weapon, chemical mace, pepper mace, or a tear gas device openly with the intent or purpose of injuring an individual in an unlawful manner.

(d)(1) A person who violates this section is guilty of a misdemeanor and on conviction is subject to imprisonment not exceeding 3 years or a fine not exceeding $1,000 or both.

(2) For a person convicted under subsection (c)(1) or (2) of this section, if it appears from the evidence that the weapon was carried, concealed or openly, with the deliberate purpose of injuring or killing another, the court shall impose the highest sentence of imprisonment prescribed.