(a) Except where a dividing line is fixed in a river by law, the jurisdiction of a county lying on a navigable river in this State extends from the shore to the channel of the river dividing the county from another county.
(b) Except as provided in subsection (c) of this section, if a vessel is located on a river between counties, process may be served on board the vessel by an officer of either county.
(c) A vessel that is moored or fastened to the land on either side of a river is considered to be in the county where the vessel is fastened.
Structure Maryland Statutes
Title 9 - General and Administrative Provisions
Section 9-101 - Meetings of County Governing Bodies
Section 9-102 - Copies of Public Local Laws
Section 9-103 - Baltimore City -- Publication of Code of Ordinances
Section 9-104 - Powers of Governing Body
Section 9-105 - Adoption of Local Laws by County Commissioners After Public Hearing
Section 9-106 - Acts, Ordinances, and Resolutions -- Generally
Section 9-108 - Jurisdiction and Service of Process on Navigable Rivers
Section 9-109 - Jurisdiction and Service of Process on Navigable Waters Other Than Rivers
Section 9-110 - Frederick County Is Region of State