Md. Code, Transportation § 5-1104

(a) If a person is apprehended by a police officer for the violation of any provision of this title that is punishable as a misdemeanor or for the violation of any rule, regulation, or order adopted under this title that is punishable as a misdemeanor, the officer shall prepare and sign a written citation.

(b) The citation shall contain:

(1) A notice to the person charged to appear in court;

(2) The name and address of the person charged;

(3) The State registration number of any aircraft involved in the offense;

(4) The offense charged;

(5) The time and place the person charged is required to appear in court;

(6) A form for the written promise of the person charged to appear in court; and

(7) Any other necessary information.

(c) The person charged may give his written promise to appear in court by signing the form for written promise on the citation prepared by the police officer. In this event, the officer need not take the person into physical custody for the violation unless:

(1) The person charged does not furnish satisfactory evidence of identity; or

(2) The officer has reasonable grounds to believe the person charged will disregard a written promise to appear.

(d) (1) Regardless of the disposition of the charge for which the citation was issued, a person may not violate his written promise to appear given on the issuance of a citation.

(2) A written promise to appear in court may be complied with by an appearance by counsel.