; and (B) establish the extent to which the following design characteristics should preclude the issuance of an amended type certificate: (i) A new or revised flight control system. (ii) Any substantial changes to aerodynamic stability resulting from a physical change that may require a new or modified software system or control law in order to produce positive and acceptable stability and handling qualities. (iii) A flight control system or augmented software to maintain aerodynamic stability in any portion of the flight envelope that was not required for a previously certified derivative. (iv) A change in structural components (other than a stretch or shrink of the fuselage) that results in a change in structural load paths or the magnitude of structural loads attributed to flight maneuvers or cabin pressurization. (v) A novel or unusual system, component, or other feature whose failure would present a hazardous or catastrophic risk. (4) Deadline The Administrator shall finalize the actions initiated under paragraph (2) not later than 3 years after the date of enactment of this Act. (c) International leadership The Administrator shall exercise leadership within the International Civil Aviation Organization and among other civil aviation regulators representing states of aircraft design to advocate for the adoption of requirements equivalent to those described in this section. 19. Whistleblower protections Section 42121 of title 49, United States Code, is amended— (1) by striking subsection (a) and inserting the following: (a) Prohibited discrimination A holder of a certificate under section 44704 or 44705 of this title, or contractor or subcontractor of such holder, may not discharge an employee or otherwise discriminate against an employee with respect to compensation, terms, conditions, or privileges of employment because the employee (or any person acting pursuant to a request of the employee)— (1) provided, caused to be provided, or is about to provide (with any knowledge of the employer) or cause to be