We sell GE HIDs to many companies and have never had a problem with Legality.
Officially, ADR requires Auto leveling and headlamp washers fitted for HIDs.
Auto leveling adjusts the level of headlight depending on number of passengers (as passengers at the back lifts the front of the car). They do not level as the car drives along. They reason why BMWs change colour is due to the projector they use. (its like a rainbow effect, light coming from the side of the projector has the shortest wave length hence blue)
Washers are used to keep headlight free from ice. As you can imaging, snow and ice and reflect alot of light and this can cause HIDs to be "glary".
ADRs regarding HIDs are copied directly from the european ECE 37 regulations. In Europe, some counties do have lots of snow and hence the washers, however, they are useless in most parts of Australia.
In US and JAP, HIDs don't need to be self leveling or washers. However, this is soon to change.