It's a recreational 1-seat, 1-engine aircraft that weighs no more than 254 pounds & carries 5 gallons of fuel or less
(5) 
And ... And while the engines used on ultralights are not perfect, a well-
maintained [DOC] [TLE] A10 Mitchell Wing ultralight, Mitchell Wing A 10 motor glider, A-10 ... [PAR] To fly a legal Part 103 ultralight aircraft in the United States the pilot does not 
require a ...