; (3) summarizes concerns raised by the inspector general, the Government Accountability Office, and other sources with respect to the Administration’s implementation and oversight of NextGen since the date on which NextGen began; (4) describes— (A) any pertinent recommendations made by the inspector general related to the Administration’s implementation and oversight of NextGen since the date on which NextGen began; and (B) whether and how the Administration addressed the recommendations; and (5) provides any other information that the inspector general determines is appropriate. 503. Return on investment report (a) In general Not later than 1 year after the date of enactment of this Act, and annually thereafter until the date that each NextGen program has a positive return on investment, the Administrator shall submit to the appropriate committees of Congress a report on the status of each NextGen program, including the most recent NextGen priority list under subsection (c). (b) Contents The report under subsection (a) shall include, for each NextGen program— (1) an estimate of the date the program will have a positive return on investment; (2) an explanation for any delay in the delivery of expected benefits from previously published estimates on delivery of such benefits, in implementing or utilizing the program; (3) an estimate of the completion date; (4) an assessment of the long-term and near-term user benefits of the program for— (A) the Federal Government; and (B) the users of the national airspace system; and (5) a description of how the program directly contributes to a safer and more efficient air traffic control system. (c) NextGen priority list Based on the assessment under subsection (a), the Administrator shall— (1) develop, in coordination with the NextGen Advisory Committee and considering the need for a balance between long-term and near-term user benefits, a prioritization of the NextGen programs; (2) annually update the priority list under paragraph (1)