The Renewable Transport Fuel Obligations (Sustainable Aviation Fuel) Order 2024 has been implemented in the UK to enforce the usage of sustainable aviation fuel (SAF) in the aviation sector. This Order aims to significantly diminish the greenhouse gas emissions associated with aviation activities. SAF, as defined in the Order, can be sourced from renewable origins such as biological waste, renewable hydrogen, or low-carbon feedstocks. The focus is on ensuring that the production and utilization of SAF lead to a minimum of 40% reduction in greenhouse gas emissions. The obligations set by the Order require aviation fuel suppliers to progressively increase the percentage of SAF in their fuel supply. Starting at 2.041% in 2025, this percentage obligation rises annually, reaching 23.718% in 2040 and subsequent periods. Furthermore, there are specific regulations regarding the cap on the use of hydro-processed esters and fatty acids (HEFA) for SAF production, with a decreasing allowance over time to promote diversity in sustainable feedstock utilization. Overall, the Order signifies a positive step towards environmental sustainability in the aviation industry, aligning with global efforts to reduce carbon footprints and combat climate change. By mandating the use of SAF and setting clear targets for its implementation, the UK aims to make significant strides in mitigating the environmental impact of air travel.