On April 5, 2016, the biofuel trade associations Advanced Biofuels Business Council, Algae Biomass Organization, Biotechnology Innovation Organization (BIO), Growth Energy, National Biodiesel Board, and Renewable Fuels Association sent a letter to House and Senate Leaders asking for a multiyear extension of advanced biofuel tax credits. The six organizations are specifically asking that the Second Generation Biofuel Producer Tax Credit, the Special Depreciation Allowance for Second Generation Biofuel Plant Property, the Biodiesel and Renewable Diesel Fuels Credit, the Alternative Fuel and Alternative Fuel Mixture Excise Tax Credit, and the Alternative Fuel Vehicle Refueling Property through the Protecting Americans From Tax Hikes Act of 2015 are extended before they expire at the end of 2016. Other energy production tax credits have been extended, and the biofuel trade associations argue that extending certain energy tax provisions and not others creates investment uncertainty across the energy sector, and puts biofuel producers at a disadvantage.