Maryland Labor and Employment Section 9-704
§ 9-704.
  (a)   This section does not apply to a compensable hernia.
  (b)   If a covered employee is injured or dies due to an accidental personal injury, oral or written notice shall be given to the employer:
    (1)   for injury, within 10 days after the accidental personal injury; or
    (2)   for death, within 30 days after the death.
  (c)   If the notice given under subsection (b) of this section is in writing, the notice shall:
    (1)   state the name and address of the covered employee;
    (2)   state, in plain language, the time, place, nature, and cause of the accidental personal injury; and
    (3)   be signed:
      (i)   for injury, by the covered employee or by an individual on behalf of the covered employee; or
      (ii)   for death, by at least 1 dependent of the covered employee or by an individual on behalf of the dependents of the covered employee.
  (d)   Unless excused by the Commission under § 9-706 of this subtitle, failure to give notice bars a claim under this title.