Although this Regulation departs from the traditional approach of having a separate Regulation for each lamp, by combining all light signalling lamps into a single Regulation, this simplified Regulation contains all provisions and operates according to the existing structure of series of amendments, their transitional provisions and supplements. The transitional provisions associated with a new series of amendments to this Regulation will be identified for each device as applicable, this also includes a list of devices and their applicable change indexes relating to the series of amendments. a0c0