I'm assuming that it'll have some kind of tag on the line which certifies that it is legal.
The brake line is now fitted. I'm not sure what it's made from as I didn't ask. The certification is stamped on the line, and there is a clear shielding covering the entire length between the fittings. At a guess I'm assuming that the shielding makes it completely air tight.
The new line is nowhere near as bulky as the OEM line, so I might gain 0.000000000001 centimetres per second on my top speed due to the reduction in parasite drag. [smiley=laugh.gif]
My front brake has never been so good.