; (bb) the notice entitled Partial Grant of Clean Air Act Waiver Application Submitted by Growth Energy To Increase the Allowable Ethanol Content of Gasoline to 15 Percent; Decision of the Administrator (76 Fed. Reg. 4662 (January 26, 2011)); and (cc) the final rule of the Administrator entitled Regulation To Mitigate the Misfueling of Vehicles and Engines With Gasoline Containing Greater Than Ten Volume Percent Ethanol and Modifications to the Reformulated and Conventional Gasoline Programs (76 Fed. Reg. 44406 (July 25, 2011)); and (II) an identification of gaps in understanding and research needs relating to— (aa) tailpipe emissions; (bb) evaporative emissions; (cc) engine and fuel system durability; (dd) onboard diagnostics; (ee) emissions inventory and other modeling effects; (ff) materials compatibility; (gg) operability and drivability; (hh) fuel efficiency; (ii) fuel economy; (jj) consumer education and satisfaction; (kk) cost-effectiveness for consumers; (ll) catalyst durability; (mm) durability of storage tanks, piping, and dispensers for retail use; (nn) lifecycle greenhouse gas emissions of EO, E10, E15, and E85 ethanol blends; and (oo) smog formation. (B) An identification of areas of research, development, and testing necessary— (i) to ensure that existing motor fuel infrastructure is not adversely impacted by mid-level ethanol blends, including an examination of the potential impacts of mid-level ethanol blends on metal, plastic, rubber, or any other materials used in pipes or storage tanks; and (ii) to reduce the risk of misfueling by users at various points in the distribution and supply chains, including at bulk storage, retail storage, and distribution configurations, through an assessment of— (I) the best methods and practices to prevent misfueling; (II) misfueling mitigation strategies for blender pumps, including— (aa) volumetric purchase requirements; and (bb) labeling requirements; (III) the adequacy of misfueling mitigation plans approved by the Environmental Protection Agency