FAR stands for “Federal Aviation Regulations” and are established by the Federal Aviation Administration (FAA) in the United States. Part 103 of the regulations define an “ultralight” as a vehicle not an aircraft and as a result these “vehicles” are not regulated as aircraft. It is possible to fly an ultralight under part 103 in the United States without a License, Permit or training.
FAR Part 103 DOES NOT APPLY IN CANADA. You can not fly any aircraft in Canada without an appropriate Permit or License along with a valid medical certificate.

Ultralights in the United States have the following attributes:
– maximum of 1 seat
– used only for recreational or sport flying
– does not have a U.S. or foreign airworthiness certificate.
– if powered – weighs less than 254lbs empty (Excluding floats or safety devices)
– if un-powered – weighs less than 155lbs empty
– does not exceed 55 knots (63 mph) at full power in level flight.
– Has a power off stall speed not exceeding 24 knots (28 mph)

An aeroplane that complies with Part 103 in the United States can be registered as a basic ultralight in Canada and be flown with an Ultralight Pilot Permit if it complies with a minimum useful load calculation.