(h) Definitions In this section: (1) Associated elements The term associated elements means any component of an unmanned aircraft system, not permanently affixed to the unmanned aircraft, required for the remote pilot to operate such aircraft safely and efficiently in the national airspace system. (2) Beyond visual line of sight The term beyond visual line of sight means a distance at which the remote pilot in command of an unmanned aircraft system cannot see the unmanned aircraft with vision unaided by any device other than corrective lenses. (3) Unmanned aircraft