; (2) wasteful practices; (3) redundant, obsolete, or unnecessary functions; (4) inefficient processes; and (5) ineffectual or outdated policies. (c) Actions To streamline and reform FAA Not later than 60 days after the date of completion of the review under subsection (b), the Administrator shall undertake such actions as may be necessary to address the findings of the Administrator under such subsection. (d) Report to Congress Not later than 120 days after the date of completion of the review under subsection (b), the Administrator shall submit to the Committee on Transportation and Infrastructure of the House of Representatives and the Committee on Commerce, Science, and Transportation of the Senate a report on the actions taken by the Administrator pursuant to subsection (c), including any recommendations for legislative or administrative actions. 504. Aviation fuel (a) Use of unleaded aviation gasoline The Administrator of the Federal Aviation Administration shall allow the use of an unleaded aviation gasoline in an aircraft as a replacement for a leaded gasoline if the Administrator— (1) determines that an unleaded aviation gasoline qualifies as a replacement for an approved leaded gasoline; (2) identifies the aircraft and engines that are eligible to use the qualified replacement unleaded gasoline; and (3) adopts a process (other than the traditional means of certification) to allow eligible aircraft and engines to operate using qualified replacement unleaded gasoline in a manner that ensures safety. (b) Timing The Administrator shall adopt the process described in subsection (a)(3) not later than 180 days after the later of— (1) the date of completion of the Piston Aviation Fuels Initiative of the Administration