Any inclusion in the equipment of devices additional to those listed in point 1 must not interfere with the proper operation of the mandatory devices or with the reading of them.
Ní féidir le feistí a chuirtear isteach sa trealamh anuas orthu sin a liostaítear i bpointe 1 cur isteach ar oibriú ceart na bhfeistí éigeantacha nó maidir le hiad a léamh.