It is the sense of Congress that the national airspace system requires additional rotorcraft, powered-lift aircraft, and low-altitude instrument flight rules, routes leveraging advances in performance based navigation in order to provide direct, safe, and reliable routes that ensure sufficient separation from higher altitude fixed wing aircraft traffic. (b) Low-altitude rotorcraft and powered-lift aircraft instrument flight routes (1) In general Not later than 3 years after the date of enactment of this Act, the Administrator shall initiate a rulemaking process to establish or update, as appropriate, low altitude routes and flight procedures to ensure safe rotorcraft and powered-lift aircraft operations in the national airspace system. (2) Requirements In carrying out this subsection, the Administrator shall— (A) incorporate instrument flight rules rotorcraft operations into the low-altitude performance based navigation procedure infrastructure