The environmental impact of private jets contribute to global aviation emissions, estimated at 3% of total emissions. Private jets, though carrying few passengers, can emit tens of tonnes of CO2 per flight, highlighting the inequality in emissions compared to average global citizens, whose annual carbon footprint is around 4.7 tonnes: already from these figures one can see the importance and necessity of having adequate standard for business aviation. The aim of this thesis is to define the CO2 emission requirements of the Business Jet category, starting from a comparison with the regulations currently in force, specialising in the regulation of emissions from civil aviation aircraft.