; and (B) prioritize the development of new helicopter area navigation (RNAV) instrument flight rules routes, acting through notice and comment rulemaking, as part of the United States air traffic service route (ATS) structure that utilize performance based navigation, such as Global Positioning System (GPS) and Global Navigation Satellite System (GNSS) equipment. (2) Consultation In carrying out the rulemaking process under paragraph (1), the Administrator shall consult with— (A) stakeholders in the airport, heliport, rotorcraft manufacturer, rotorcraft operator, general aviation operator, commercial air carrier, and performance based navigation technology manufacturer sectors; (B) the United States Helicopter Safety Team; and (C) other stakeholders determined appropriate by the Administrator. 410. ADS-B out equipage study; Vehicle-to-Vehicle link program (a) Study and briefing on ADS-B out equipage (1) Study Not later than 90 days after the date of enactment of this section, the Administrator shall initiate a study to determine— (A) the number of aircraft registered in the United States and other devices operating in the airspace of the United States that are not equipped with Automatic Dependent Surveillance-Broadcast (ADS-B) out equipment; (B) the requirements for and impact of expanding the dual-link architecture that is used below an altitude of FL180 to any altitude below the current radar floor; (C) the costs and benefits of equipage