In most cases, an ultralight aircraft license is actually not required for the operation of ultralight aircraft. The definition of an ultralight aircraft is one that has only one seat, is used for recreation, does not have an airworthiness certificate, and weighs less than 155 pounds (unpowered) or 254 pounds (powered). As the definition implies, these aircraft are ultralight. There is a great deal of freedom involved in the piloting of ultralight vehicles. Unlike all other types of aircraft, an ultralight aircraft does not require an ultralight aircraft license. While it is foolish to attempt to fly anything without training, the FCC does not regulate the operation of ultralight aircraft. Training is highly recommended, but a pilot does not need to meet any requirements or obtain any sort of ultralight aircraft license. Restrictions on ultralight aircraft operation include only flying during daylight hours, not obstructing any other air traffic (other traffic has the right of way), and avoiding flight over congested or populous areas.