The base of the wheelchair (with push rings and attachments) cannot measure more than 30" x 50" (76 cm x 127 cm). Bags attached to the backs of wheelchairs must be compact and fit into the space behind the chair's back. If the wheelchair has handles, bags should not extend past the end of the handles or below the level of the seat. If there are no handles, suggested bag size is 14" wide by 18" high by 6" deep, or smaller (36 x 46 x 15 cm).
Wheelchairs must have a secure, easily identifiable place on the frame for the tie-downs to be attached at approximately a 45 degree angle to the floor. The wheelchair, passenger and parcels/ baggage cannot have combined weight of more than 750 pounds (337 kg).