Thanks, that was the document I was looking for.
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John
I was only suggesting that inertia-reel belts in a SIIa would need to be "engineered", because at the time the SIIa was assembled inertia-reel belts did not exist and therefore the anchorage for the inertia-reel could not have been OEM. Those two facts would indicate a need for their fitting to be engineered or at least certified by a seat-belt fitting station.
Diana
These strange beasts only exist in NSW (and recently established in VIC) AFAIK.
But either way, John's point is that inertia reel belts existed long before modification approval regulations OR seat belt fitting stations. However I suspect the onus would be on you to prove that the modification was done prior to that date.
re fold down windscreens, that's the case in NSW. The example put to me was WWII era Jeeps.
As to engineering harnesses, my experience is different. I've put an ex-race MG on full registration, and no-one batted an eyelid at the harness. They were more interested in sliding a wooden block under the exhaust. In NSW.
Regards
Max P