1. The aircraft operator shall monitor the amount of alternative aviation fuels used and report that amount as attributed to each flight or aerodrome pair.

2. Where the alternative aviation fuels are delivered to the aircraft in physically identifiable batches, the aircraft operator shall provide evidence to the satisfaction of the competent authority that the alternative aviation fuel is attributed to the flight immediately following the fuel uplift of that flight.

Where several subsequent flights are carried out without fuel uplift between these flights, the aircraft operator shall split the amount of the alternative fuel and assign it to these flights proportionally to the emissions from those flights calculated using the preliminary emission factor.