Maryland Environment Section 1-806
§ 1-806.
  (a)   A copy of an environmental covenant shall be provided by the persons and in the manner required by the agency to:
    (1)   Each person that signed the covenant;
    (2)   Each person holding a recorded interest in the real property subject to the covenant;
    (3)   Each person in possession of the real property subject to the covenant;
    (4)   Each municipality or other unit of local government in which real property subject to the covenant is located; and
    (5)   Any other person the Agency requires.
  (b)   The validity of a covenant is not affected by failure to provide a copy of the covenant as required under this section.