; and (2) the schedule and process that will be used to implement PBN at additional airports, including information on how the Administration will partner and coordinate with private industry to ensure expeditious implementation of PBN at additional airports. 4109. Securing aircraft avionics systems (a) In general The Administrator of the Federal Aviation Administration 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). 4110. Defining NextGen Not later than 1 year after the date of enactment of this Act, the Comptroller General of the United States shall— (1) assess how the line items included in the Administration’s NextGen budget request relate to the goals and expected outcomes of NextGen, including whether and how NextGen programs directly contribute to a measurably safer and more efficient air traffic control system