Isn't this the same car you asked me about earlier this year?
If it was competing in Group N elsewhere, it probably has a homologated cage with certificate, and the certificate must be kept with the car and logbook and be available at tech for every event (same as FIA rules).
You can see me at LSPR about a log book, (I've been told that the R-A books are finally done!) the local scruitineers are usually too busy to deal with logbooks at events.
If it was competing in Group N elsewhere, it probably has a homologated cage with certificate, and the certificate must be kept with the car and logbook and be available at tech for every event (same as FIA rules).
You can see me at LSPR about a log book, (I've been told that the R-A books are finally done!) the local scruitineers are usually too busy to deal with logbooks at events.