4.5.1.3.2. In case of the driving beam, one or more filament light sources approved according to UN Regulation No. 37, one or more gas-discharged light source approved according to UN Regulation No. 99, one or more LED light sources approved according to UN Regulation No. 128 and/or LED module(s). Where more than one light source is used to provide the driving beam, these light sources shall be operated simultaneously. a0c0