; unmanned aircraft system The terms unmanned aircraft and unmanned aircraft system have the meaning given such terms in section 44801 of title 49, United States Code. 2. Special authority for unmanned aircraft systems Section 44807 of title 49, United States Code, is amended— (1) in subsection (a)— (A) by inserting or chapter 447 after this chapter ; (B) by striking the Secretary of Transportation and inserting the Administrator of the Federal Aviation Administration ; and (C) by striking if certain and inserting how ; (2) in subsection (b)— (A) by striking the Secretary and inserting the Administrator ; and (B) in paragraph (1)— (i) by striking which types of unmanned aircraft systems, if any, as a result of their size and inserting how the unmanned aircraft, as a result of such aircraft’s size ; and (ii) by striking do not create and inserting does not create ; (3) in subsection (c) to read as follows: (c) Requirements for safe operation (1) In general For unmanned aircraft systems that the Administrator determines under this section may operate safely in the national airspace system, the Administrator shall establish requirements, or a process to accept proposed requirements, for the safe operation of such aircraft systems in the national airspace system, including operation related to testing and evaluation of proprietary systems. (2) Treatment of mitigation measures To the extent that a proposed operation will be conducted exclusively within the airspace of a Mode C Veil during the entirety of the operation, such operation shall be treated as satisfying the requirements of section 91.113(b) of title 14, Code of Federal Regulations, so long as the operation employs— (A) ADS–B In-based detect and avoid capabilities; (B) air traffic control communication and coordination