; and (II) with respect to a flight with 4 or more classes of service, in either of the 2 highest classes of service. (B) Inclusion The term qualifying ticket includes a ticket for a seat, regardless of class of service, capable of reclining at an angle of greater than 45 degrees, including a seat capable of lying fully flat. (C) Treatment of multiple flight segments If only 1 ticket is provided for travel the itinerary of which includes 2 or more flight segments, the ticket shall be treated as a separate qualifying ticket for each separate takeoff and landing for a flight described in subparagraph (A)(i) in a seat described in subparagraphs (A)(ii) and (B) (as applicable). (8) Real flight time (A) In general The term real flight time , with respect to a flight, means the period between the time of takeoff and the time of landing. (B) Exclusion The term real flight time does not include any period during which the aircraft used for the flight taxies to a gate, stands at a gate, or is otherwise grounded. (9) Sustainable aviation fuel (A) In general The term sustainable aviation fuel means any neat fuel that achieves a reduction in average net lifecycle greenhouse gas emissions, as compared to traditional jet fuel, of at least 50 percent. (B) Exclusion The term sustainable aviation fuel does not include any fuel that is made from feedstock that includes palm oil, palm fatty acid distillate, petroleum, or plastic. (b) Consumption of fuel (1) In general For purposes of this Act, fuel may be considered consumed if the fuel has been delivered directly to an aircraft or to a public use airport fueling system, including pipelines to a public use airport if there is no prospect of the fuel being diverted or removed from that airport fueling system before the point of use by an aircraft. (2) Assignment For purposes of assigning the consumption of fuels to flights for the assessment of a surcharge under this Act, an operator of a flight may enter into a binding, exclusive agreement to transfer the assignment of fuel that is