; (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; and (2) not later than 90 days after the date the plan is submitted under paragraph (1), submit to the appropriate committees of Congress a report on the progress made toward meeting the 2020 ADS–B Out mandate. 506. Securing aircraft avionics systems (a) In general The Administrator shall consider, where appropriate, revising Federal Aviation Administration regulations regarding airworthiness certification— (1) to address cybersecurity for avionics systems, including software components; and (2) to require that aircraft avionics systems used for flight guidance or aircraft control be secured against unauthorized access via passenger in-flight entertainment systems through such means as the Administrator determines appropriate to protect the avionics systems from unauthorized external and internal access. (b) Consideration In carrying out subsection (a), the Administrator shall consider the recommendations of the Aircraft Systems Information Security Protection Working Group under section 2111 of the FAA Extension Safety and Security Act of 2016 ( Public Law 114–190 ; 130 Stat. 615). 507. Human factors (a) In general In order to avoid having to subsequently modify products and services developed as a part of NextGen, the Administrator shall— (1) recognize and incorporate, in early design phases of all relevant NextGen programs, the human factors and procedural and airspace implications of stated goals and associated technical changes