Spherically Jointed Suspension Arms

[MrStabby]

My car is getting tie rod ends and alignment done, and i said to the suspension place that if they cant get enough castor with the adjustable bushes to install some JJR castor rods. The dude asked if they were rose/spherically-jointed, i said yes, and he said he didnt think they were legal. Does anyone have an opinion either way? Or is it just a case that any non-trivial change needs to be engineered then its ok. Do engineers pass rose jointed suspension arms? (Its NSW BTW)