Maryland Environment Section 2-604
§ 2-604.
  (a)   A corrective order issued under this subtitle shall:
    (1)   Specify the provision that allegedly has been violated;
    (2)   Describe the nature and extent of the alleged violation;
    (3)   Require corrective action within a time specified in the order; and
    (4)   State that the person charged will receive a hearing if the person requests the hearing within 10 days after service.
  (b)   Each corrective order issued under this subtitle shall be in writing and shall be served:
    (1)   As a summons is served under the Maryland Rules; or
    (2)   By certified mail.
  (c)   Unless the person charged with a corrective order requests a hearing within 10 days after service, the corrective order becomes a final order.
  (d)   If the person charged with a corrective order makes a timely request for a hearing under subsection (c) of this section, the Secretary shall:
    (1)   Hold a hearing within 20 days after the request is made; and
    (2)   Give the person written notice of the date, time, and place of the hearing, at least 10 days before the hearing date.