Again 1 country 7 different laws, a crab bar in Nsw only needs to be fitted by an approved person, so 390, in Nsw the bolts in the seat back have to be engineered so 1k as they have an eng who knows what their doing. Every other state is different. In the car child seat bolt thread there are 110's with the bolt points on the cargo barrier that got a mod plate in Qld , but that's a different state.:D
As has been said check vic current laws and find a fitter with some idea or past experience with defenders.

