In addition to wheelchair accessibility at least 5% of Aisle Seats must have folding or retractable armrests. These seats are intended for use by individuals who have difficulty walking. These designated aisle seats must be located closest to accessible routes and labelled with approved insignia. Note the calculation is a percentage of Aisle Seats and not the number of total seats. Designated aisle standards can be either a flip-up arm aisle standard that does not have a decorator panel or one with an aisle panel capable of swinging open.