Be very surprised if it could get signed off. As you have to cut and shut brake lines to install it.
Not true, mount it near the diff where there is a factory join, use correct flex brake line and fitting and you never cut anything, you only undo and redo fittings that are adr approved.
As for engineering I got the idea from a mate in wa who had his engineer say this was the only way he’d sign off. Engineering in general it seems is very subjective?
I only like it because it’s idiot proof:p