5.3.1. The identifications of controls for which the word "Yes" is indicated in column 4 of Table 1 shall be capable of being illuminated whenever the position lamps are activated. This does not apply to controls located on the floor, floor console, steering wheel, or steering column, or in the area of windscreen header, or to controls for a heating and air-conditioning system if the system does not direct air directly upon the windscreen. a0c0