; public safety personnel. . 202. Commissioned service retirement For Coast Guard officers who retire in fiscal year 2017 or 2018, the President may reduce the period of active commissioned service required under section 291 of title 14, United States Code, to a period of not less than eight years. 203. Officer promotion zones Section 256(a) of title 14, United States Code, is amended by striking six-tenths. and inserting one-half. . 204. Cross reference Section 373(a) of title 14, United States Code, is amended by inserting designated under section 371 after cadet . 205. Repeal Section 482 of title 14, United States Code, and the item relating to that section in the analysis for chapter 13 of that title, are repealed. 206. Unmanned aircraft system (a) In general Chapter 3 of title 14, United States Code, is amended by adding at the end the following: 61. Unmanned aircraft system (a) In general Subject to the availability of appropriations and to subsection (b), the Secretary of the department in which the Coast Guard is operating shall establish a land-based unmanned aircraft system program under the control of the Commandant of the Coast Guard. (b) Limitations (1) In general During any fiscal year for which funds are appropriated for the design or construction of the Offshore Patrol Cutter, the Commandant— (A) may not award a contract for design of an unmanned aircraft system for use by the Coast Guard; and (B) may acquire an unmanned aircraft system only if such a system— (i) has been part of a program of record, procured by, or used by, the Department of Defense or the Department of Homeland Security, or a component thereof, before the date on which the Commandant acquires the system