Given SAF from standalone plants is produced from 100% renewable feedstocks the requirement for C-14 isn't necessary and we anticipate this resource-intensive test method will eventually be removed for standalone produced SAF. We believe that feedstock traceability and lifecycle reduction measures are a more efficient and cost-effective way of measuring and accounting for the carbon footprint of SAF produced through co-processing too, and as such, we would like to see C-14 testing replaced by these in all circumstances. A combination of co-processing and standalone units is required to meet industry targets As the aviation sector continues to explore opportunities to scale up the production of SAF in the most economical and efficient way, bp considers that co-processing has an integral role to play. However, we also believe that co-processing on its own won't be enough to meet increasing SAF demand. Standalone units will also be required to ramp up production.