; (B) update such assessment to account for each subsequent proposed design change that the Administrator determines is significant; and (C) provide appropriate employees of the Administration with the data and assumptions underlying each assessment and amended assessment; and (2) work with other civil aviation authorities representing states of design to ensure such regulations remain harmonized internationally. (c) FAA review Appropriate employees of the Aircraft Certification Service and the Flight Standards Service of the Administration shall review each system safety assessment required under subsection (b)(1)(A), updated assessment required under subsection (b)(1)(B), and supporting data and assumptions required under subsection (b)(1)(C), to ensure that each such assessment sufficiently considers the matters listed under subsection (b)(1). 17. Flight crew alerting (a) In general Not later than 1 year after the date of enactment of this Act, the Administrator shall fully implement National Transportation Safety Board recommendations A–19–11 and A–19–12 (as contained in the safety recommendation report adopted on September 9, 2019). (b) Prohibition Beginning on the date that is 2 years after the date of enactment of this Act, the Administrator may not issue a type certificate for a transport-category aircraft unless— (1) in the case of a transport airplane, such airplane incorporates a flight crew alerting system that, at a minimum, displays and differentiates among warnings, cautions, and advisories, and includes functions to assist the flight crew in prioritizing corrective actions and responding to systems failures