I'd have to look into the right Regulation, but I'm pretty sure for main headlights there is a limitation to two plus foglight. I'll come back to that.
Actually it has been previously mentioned correctly. It's the forward visibility that's preventing the tri-bars from being accepted as DRL.
According to ECE-Regulation R87 (that's for DRL on vehicles), there is no limitation in number of lamps. But DRL has to be visible in the vertical axis in...