; and (C) transition unmanned aircraft systems technologies from research to operations as the Administrator considers appropriate. (2) Briefing Not later than 270 days after the date of enactment of the Act, the Administrator of the National Oceanic and Atmospheric Administration shall brief the appropriate committees of Congress on the activities under paragraph (1). (3) Pilot programs Not later than 18 months after the date of the enactment of this Act, the Administrator of the National Oceanic and Atmospheric Administration may conduct pilot programs of unmanned aircraft systems for fire weather and fire environment observations, including relating to the following: (A) Testing of unmanned aircraft systems in approximations of real-world scenarios. (B) Assessment of the utility of meteorological data collected from fire response and assessment aircraft. (C) Input into appropriate models of collected data to predict fire behavior, including coupled atmosphere and fire models. (D) Collection of best management practices for deployment of unmanned aircraft systems for fire weather and fire environment observations. (4) Prohibition (A) In general Except as provided under subparagraphs (B) and (C), the Administrator of the National Oceanic and Atmospheric Administration may not procure any unmanned aircraft system that is manufactured or assembled by an entity in a foreign country of concern. (B) Exemption The prohibition under subparagraph (A) shall not apply to the Administrator of the National Oceanic and Atmospheric Administration if the Administrator determines, in consultation with the Secretary of Homeland Security, that the procurement of an unmanned aircraft system is necessary for the sole purpose of marine or atmospheric science or management. (C) Waiver The Administrator of the National Oceanic and Atmospheric Administration may waive the prohibition under subparagraph (A) on a case-by-case basis— (i) with the approval of the Secretary of Homeland Security