Maryland Statutes
Part I - General Provisions
Section 2-301 - Service of Writs

(a)    Except as provided in § 2-302 of this subtitle, the sheriff shall serve all papers directed to him according to their instructions, within the time set by the court.
    (b)    (1)    A sheriff may serve papers in a county other than the county of which he is sheriff; or
        (2)    The clerk may send a paper to the sheriff of another county for service by him. After serving the paper the sheriff shall file a return with the court from which it was issued.