; (B) develop a plan to address the known barriers identified in paragraph (1), including a schedule for— (i) periodically reevaluating the potential barriers identified in paragraph (1); and (ii) developing solutions and implementing actions to address the known and potential barriers; and (C) submit the plan to the appropriate committees of Congress; (2) periodically update the plan and, not later than 30 days after the completion date, submit the update to the appropriate committees of Congress; and (3) not later than 30 days after the date the plan is submitted under paragraph (2), and annually thereafter until January 1, 2020, submit to the appropriate committees of Congress a report on the progress made toward meeting the 2020 ADS–B Out mandate. 4106. NextGen interoperability (a) In general To implement a more effective international strategy for achieving NextGen interoperability with foreign countries, the Administrator shall take the following actions: (1) Conduct a gap analysis to identify potential risks to NextGen interoperability with other Air Navigation Service Providers and establish a schedule for periodically reevaluating such risks. (2) Develop a plan that identifies and documents actions the Administrator will undertake to mitigate such risks, using information from the gap analysis as a basis for making management decisions about how to allocate resources for such actions. (b) Report Not later than 1 year after the date of enactment of this Act, the Administrator shall submit to the appropriate committees of Congress a report on the analysis conducted under paragraph (1) of subsection (a) and on the actions the Administrator has taken under paragraph (2) of such subsection. 4107. NextGen transition management (a) In general The Administrator shall— (1) identify and analyze technical and operational maturity gaps in NextGen transition and implementation plans