§ 103.1 - Applicability.

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This part prescribes rules governing the operation of ultralight vehicles in the United States. For the purposes of this part, an ultralight vehicle is a vehicle that:

Is used or intended to be used for manned operation in the air by a single occupant;

Is used or intended to be used for recreation or sport purposes only;

Does not have any U.S. or foreign airworthiness certificate; and

If unpowered, weighs less than 155 pounds; or

If powered:

Weighs less than 254 pounds empty weight, excluding floats and safety devices which are intended for deployment in a potentially catastrophic situation;

Has a fuel capacity not exceeding 5 U.S. gallons;

Is not capable of more than 55 knots calibrated airspeed at full power in level flight; and

Has a power-off stall speed which does not exceed 24 knots calibrated airspeed.