14 CFR 22.180: Special requirements for light-sport category aircraft with simplified flight controls.

An aircraft that meets the following requirements may be designated by the manufacturer as having simplified flight controls—

(a) The aircraft's flight path and available power are automated, allowing the pilot to only intervene without the availability of primary flight controls;

(b) The aircraft is designed to inherently prevent loss of control under likely circumstances, regardless of pilot input; and

(c) The aircraft has a means to enable the pilot to quickly and safely discontinue or alter the flight and prevent any inadvertent activation of these functions.