Md. Code, Land Use § 8-101

(a) In this title the following words have the meanings indicated. (b) “Appurtenance and environmental setting” includes: (1) paved or unpaved walkways and driveways; (2) trees; (3) landscaping; (4) pastures; (5) croplands; (6) waterways; and (7) rocks. (c) “Commission” includes a historic district commission or a historic preservation commission. (d) “Demolition” includes any willful neglect in the maintenance and repair of a structure, other than the appurtenance and environmental setting of the structure, that: (1) is not due to a financial inability to maintain and repair the structure; and (2) threatens to result in a substantial deterioration of the exterior features of the structure. (e) “District” means a significant concentration, linkage, or continuity of sites, structures, or objects united historically or aesthetically by plan or development. (f) “Person” includes a unit of local government. (g) “Routine maintenance” means work that: (1) does not alter the exterior fabric or features of a site or structure; and (2) has no material effect on the historical, archaeological, or architectural significance of the site or structure. (h) “Site” means the location of: (1) an event of historic significance; or (2) a structure or ruin that possesses historic, archaeological, or cultural significance. (i) (1) “Structure” means a combination of material to form a construction that is stable. (2) “Structure” includes: (i) a building; (ii) a stadium; (iii) a reviewing stand; (iv) a platform; (v) staging; (vi) an observation tower; (vii) a radio tower; (viii) a water tank or tower; (ix) a trestle; (x) a bridge; (xi) a pier; (xii) paving; (xiii) a bulkhead; (xiv) a wharf; (xv) a shed; (xvi) a coal bin; (xvii) a shelter; (xviii) a fence; (xix) a display sign that is visible or intended to be visible from a public way; and (xx) a part of a structure.