While TBO procedures have been established since 2019, ICAO secretary general Juan Carlos Salazar says the concept will benefit from standards being set.
ICAO Air Navigation Commission President Padhraic Kelleher said mandates would only come after "a significant process of consultation ... with states."
Sustainable aviation fuels (SAF) have been certified under the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) for the first time.