; and (C) a detailed schedule of actions necessary to complete the program, including updated milestones and deadlines. (b) Independent report (1) In general Not later than 90 days of the date of enactment of this section, the Administrator shall contract with an independent third-party contractor or a Federally funded research and development center to develop a report reviewing and assessing the implementation of the NextGen project. (2) Requirements The report developed under paragraph (1) shall include the following: (A) Evaluation of the promised operational benefits at the time of initiation and the realized benefits upon completion of the NextGen project. (B) Recommendations for the technical capacity and resources needed by the FAA in order to oversee a comprehensive airspace modernization project on-schedule and on-budget. (C) Identification of programs under the NextGen project that were significantly delayed, significantly diminished, or ultimately not implemented, including an explanation of the cause of the delay, reduction, or removal of the program from the NextGen project by the FAA. This discussion shall include at a minimum, programs relating to expanding surveillance coverage across the country, increasing performance-based navigation, and improving enroute data communications. (D) Identification of any challenges that impacted the implementation of the NextGen project. (E) Identification of any lessons learned during the NextGen project effort, and whether, how, and to what effect those lessons may be applied to future national airspace system modernization efforts. (F) Assessment of national airspace system user engagement in the NextGen project priorities and implementation. (G) Recommendations of the justifications for further national airspace system modernization efforts including economic, safety, efficiency, capacity, predictability, and resiliency of the United States air transportation system. (3) Deadline Not later than June 30, 2026, the report developed under paragraph (1) shall be