Md. Code, Public Safety § 14-503
§14–503.
(a) The Program applies to:
(1) motor gasoline;
(2) middle distillate;
(3) propane;
(4) residual fuel oil, except as provided in subsection (b) of this section; and
(5) aviation gasoline.
(b) The Program does not apply to residual fuel oil that is used:
(1) in an electric generating station; or
(2) as bunker fuel for marine shipping.