It is a worth while heads up, but I think unmanageable.

Can you imagine them checking every car?

I think as long as it looks sound and solid from the outside, they won't even give you a second glance.

It's the same scenario as the noise limit. As long as you are not running stupid levels of noise, like a (very ironic this too ) blitz NUR spec and de cat, then they don't even bother you.

I think it's just another bit of legislation to basically make you make sure that everything is in good nick before you leave and all tightened up.