Md. Code, Local Government § 4–104

(a) In this section, “special district” means a special tax area or district,

sanitary district, park or planning district, soil conservation district, or public agency

exercising specific powers in a defined area that does not exercise general municipal

functions.

(b) (1) Except as provided in paragraph (2) of this subsection, a

municipality located in a special district may not exercise, divest, or duplicate in the

municipality’s corporate limits any special power or duty conferred on the special

district.

(2) Subject to the consent of the special district, a municipality may,

within its corporate limits, provide recreational facilities within a special district’s

jurisdiction.

(c) A municipality may not exempt an area from any property tax, special

benefit assessment, or service charge imposed to support a special district.

(d) A local law conferring a special power or duty on a special district does

not authorize the special district to exercise that power or perform that duty in an

area where a municipality continues to exercise the power or perform the duty.

(e) A municipality may not amend or repeal its charter or exercise its

powers of annexation or incorporation as to affect the power of:

(1) the Maryland–National Capital Park and Planning Commission,

relating to zoning; or

(2) the Washington Suburban Sanitary Commission, relating to

sanitation, including sewer, water, and similar facilities.

(f) Article XI–E of the Maryland Constitution, this division, and Division I

of the Land Use Article do not authorize a municipality, through procedures under

this title or other changes in the municipal charter, to exercise planning authority,

subdivision control, or zoning jurisdiction in a political subdivision in which a State,

regional, or county unit exercises planning authority, subdivision control, or zoning

jurisdiction.