Md. Code, Local Government § 13–404

(a) The County Commissioners of Calvert County may provide that unpaid

charges made against real property for the removal of an unauthorized accumulation

of weeds or debris from the property are a lien on the property until paid.

(b) The County Commissioners of Calvert County shall provide reasonable

notice to the property owner that a lien may be imposed under subsection (a) of this

section before the removal of weeds or debris from the property.