As emissions trading schemes and other carbon compliance regimes emerge, certain biofuels are likely to be exempted ("zero rated") by governments from carbon compliance due to their closed-loop nature, if they can prove their wider sustainability credentials. For example, in the EUTS, SAFUG's proposal was accepted that only fuels certified as sustainable by the RSB or similar body would be zero rated. SAFUG was formed by a group of interested airlines in 2008 under the auspices of Boeing Commercial Airplanes. Member airlines represent more than 15% of the industry, and signed a pledge to work towards SAF.
