Maryland State Personnel and Pensions Section 31-102
§ 31-102.
  Subject to § 22-202(b) of this article, the governmental units that are eligible to participate in the employees' systems are:
    (1)   a political subdivision of the State, including:
      (i)   a county;
      (ii)   a municipal corporation; and
      (iii)   a special taxing area; and
    (2)   the following governmental units:
      (i)   an agency on aging, as designated by the legislative body of the agency on aging;
      (ii)   the Allegany County Transit Authority;
      (iii)   subject to § 31-104 of this subtitle, the Baltimore Metropolitan Council;
      (iv)   a board or commission created by an Act of the General Assembly for public purpose and not for the profit of a private person;
      (v)   subject to § 31-105 of this subtitle, the Canal Place Preservation and Development Authority;
      (vi)   the Chesapeake Bay Commission;
      (vii)   a cooperative library commission;
      (viii)   subject to § 31-103 of this subtitle, a community action agency, as designated by the legislative body of the community action agency;
      (ix)   a fire department that receives any of its funds from or through a county, municipal corporation, special taxing area, or other political subdivision of the State;
      (x)   the Health Planning Council of Appalachia;
      (xi)   the Howard County Economic Development Authority;
      (xii)   the Interstate Commission on the Potomac River Basin;
      (xiii)   the Lower Shore Private Industry Council, Inc.;
      (xiv)   the Maryland Environmental Service;
      (xv)   subject to § 31-106 of this subtitle, the Maryland Stadium Authority;
      (xvi)   a public library association or organization;
      (xvii)   the St. Mary's County Nursing Home;
      (xviii)   the Tri-County Council for Western Maryland, Inc.;
      (xix)   the Tri-County Council for Southern Maryland;
      (xx)   subject to § 31-107 of this subtitle, the University of Maryland Medical System Corporation;
      (xxi)   the Upper Potomac River Commission;
      (xxii)   subject to § 31-106.1 of this subtitle, the Maryland African American Museum Corporation; and
      (xxiii)   the Garrett County Office for Children, Youth and Families.