Md. Code, Labor and Employment § 9–805

A waiver executed under § 9-657 of this title by a covered employee who previously has lost or lost the use of a hand, arm, foot, leg, or eye is not a bar to benefits under this subtitle if the covered employee becomes permanently and totally disabled because of the loss or loss of use of a hand, arm, foot, leg, or eye due to an accidental personal injury, occupational disease, or compensable hernia.