S.L. 499.59 Art. 27Horn.

No other horn other than that installed by the manufacturer of the vehicle shall be used on a taxi: Provided that where the horn installed by the manufacturer of the vehicle needs to be replaced due to malfunction or damage caused thereto, it shall only be replaced by a horn of the same make. If this is not possible, the prior written approval of the Authority must be sought for the installation of a horn of a different make.