Md. Code, Lab. & Empl. § 9-601 : LABOR AND EMPLOYMENT — WORKERS' COMPENSATION — BENEFITS — GENERAL PROVISIONS —601 - Construction of subtitle TEXT PDF A provision of this subtitle may not be construed to change: (1) a law relating to an accidental personal injury or an occupational disease, that occurred before the effective date of the provision and for which a claim is made under this title; or (2) the payment basis in effect when an accidental personal injury or an occupational disease, for which a claim is made under this title, occurred. Md. Code, LE § 9-601