; and (2) confer upon the Administrator the authorities of the Administrator of the Pipeline and Hazardous Materials Safety Administration under part 175 of title 49, Code of Federal Regulations, and chapter 51 of title 49, United States Code. (g) Definition of hazardous materials In this section, the term hazardous materials has the meaning given such term in section 5102 of title 49, United States Code. 934. Operations over high seas (a) In general To the extent permitted by treaty obligations of the United States, including the Convention on International Civil Aviation (in this section referred to as ICAO ), the Administrator shall work with other civil aviation authorities to establish and implement operational approval processes to permit unmanned aircraft systems to operate over the high seas within flight information regions for which the United States is responsible for operational control. (b) Consultation In establishing and implementing the operational approval process under subsection (a), the Administrator shall consult with appropriate stakeholders, including industry stakeholders. (c) ICAO activities Not later than 6 months after the date of enactment of this Act, the Administrator shall engage ICAO through the submission of a working paper, panel proposal, or other appropriate mechanism to clarify the permissibility of unmanned aircraft systems to operate over the high seas. (d) Review Not later than 6 months after the date of enactment of this Act, the Administrator shall review whether, and to what extent, ICAO member states are approving the operation of unmanned aircraft systems over the high seas and brief the appropriate committees of Congress regarding the findings of such review. 935. Protection of public gatherings (a) In general Chapter 448 of title 49, United States Code, is further amended by adding at the end the following: 44812. Temporary flight restrictions for unmanned aircraft (a) In general (1) Temporary flight restrictions The Administrator of the Federal Aviation