; (B) a unit of local government; (C) a Tribal Government; (D) a metropolitan planning organization; or (E) a combination of the entities described in subparagraphs (A) through (D). (8) Small unmanned aircraft; unmanned aircraft; unmanned aircraft system The terms small unmanned aircraft , unmanned aircraft , and unmanned aircraft system have the meanings given such terms in section 44801 of title 49, United States Code. 819. Unmanned aircraft in the Arctic (a) In general Section 44804 of title 49, United States Code, is amended— (1) in the section heading, by striking Small unmanned and inserting Unmanned