; (ii) describes the structure and involvement of all FAA offices that have responsibilities described in paragraph (2); and (iii) identifies policy initiatives, regulatory initiatives, or legislative initiatives needed to improve and enhance the timely and safe transition to unleaded aviation gasoline for the piston-engine aircraft fleet. (B) Annual briefing Not later than 1 year after the date on which the Administrator submits the initial report under subparagraph (A), and annually thereafter through 2030, the Administrator shall brief the appropriate committees of Congress on activities and progress of the EAGLE Initiative. (C) Sunset Subparagraph (B) shall cease to be effective after December 31, 2030. (b) Transition plan to unleaded aviation gasoline (1) In general In developing the transition plan under subsection (a)(2)(E), the Administrator may, at a minimum, assess the following: (A) Efforts undertaken by the EAGLE Initiative, including progress towards— (i) safely eliminating the use of leaded aviation gasoline by piston-engine aircraft by the end of 2030 without adversely affecting the safe and efficient operation of the piston-engine aircraft fleet; (ii) approving the use of unleaded alternatives to leaded aviation gasoline for use in all piston-engine aircraft types and piston-engine models; and (iii) facilitating efforts to make approved unleaded aviation gasoline that is approved for use in piston-engine aircraft and engines widely available at airports for purchase and use in the National Plan of Integrated Airport Systems. (B) The evaluation and development of necessary airport infrastructure, including fuel storage and dispensing facilities, to support the distribution and storage of unleaded aviation gasoline. (C) The establishment of best practices for piston-engine aircraft owners and operators, airport operators and personnel, aircraft maintenance technicians, and other appropriate personnel for protecting against exposure to lead containment when— (i) conducting fueling operations