(a) In this title the following words have the meanings indicated.
(b) “Aviation fuel” means:
(1) aviation gasoline; or
(2) turbine fuel.
(c) (1) “Aviation gasoline” means gasoline that is used to propel gasoline–powered aircraft and:
(i) is invoiced as aviation gasoline; or
(ii) is received, sold, stored, or withdrawn from storage by a person for the purpose of propelling gasoline–powered aircraft.
(2) “Aviation gasoline” does not include gasoline used to propel a motor vehicle.
(d) “Clean-burning fuel” means, when used for motor vehicle propulsion:
(1) natural gas;
(2) liquefied natural gas;
(3) liquefied petroleum gas;
(4) hydrogen;
(5) electricity; or
(6) any other fuel at least 85% of which is one or more of the following:
(i) methanol;
(ii) ethanol;
(iii) any other alcohol; or
(iv) ether.
(e) (1) “Gasoline” means a product that:
(i) is used as fuel in a spark ignited, internal combustion engine; or
(ii) is designated as gasoline by the Comptroller.
(2) “Gasoline” includes:
(i) casinghead gasoline;
(ii) absorption gasoline;
(iii) other natural gasoline; and
(iv) aviation gasoline.
(f) “Motor fuel” means:
(1) gasoline; or
(2) special fuel.
(g) “Motor vehicle” means a vehicle that:
(1) is self-propelled;
(2) is designed to be operated on a public highway; and
(3) is not operated only on rails.
(h) (1) “Special fuel” means a product that is usable as fuel in an internal combustion engine.
(2) “Special fuel” includes clean-burning fuel except electricity.
(3) “Special fuel” does not include gasoline.
(i) “Turbine fuel” means Jet A, A-1, or B fuel that is used to propel turbine powered aircraft.