Maryland Statutes
Subtitle 1 - Definitions; General Provisions
Section 21-103 - Obedience to Police Officers and Summonses

(a)    (1)    A person may not willfully disobey any lawful order or direction of any police officer.
        (2)    This subsection may not be construed to authorize a police officer at a motor vehicle checkpoint, as defined in § 25–114 of this article, to target only motorcycles for inspection or evaluation, except as appropriate at a police checkpoint established as part of a police search or investigation.
    (b)    (1)    A police officer may summon witnesses to testify under oath on any charge brought under the Maryland Vehicle Law.
        (2)    A person may not willfully disobey a summons.