Harness US vs UK/EU spec

[LRdriver II]

"In general, if a vehicle is required to have a seat belt, then all seat belts which are fitted must meet either the British or European Standards, or equivalents, set out in C&U#Regulation 47. They must be correctly installed, in good working order and must display an approval mark - this will normally be an 'e' or 'E' followed by a number or a BS 'kitemark'."

I got that quote of the DOT website, My question is what do they mean with "equivalents"? I want to fit a set of Simpson harnessesin my Cobra relica and seeing they arnt UK/EU spec but are ok in the US, I think that makes them Ok..
Or can somebody point me in the right direction for info of what constitutes "equivalents"

[rustybin]

The SVA regs (available at the top of the forum) quote equivalent standards for enhanced SVA. I would assume that these could be regarded as equivalent for other purposes?