ok probably been said, but i've been through this saga recently so thought id give my experience.
i was denied for having a lock bar at regency, was told it was a safety issue being that they couldnt know whether the bar was strong enough and safe enough to take the force etc etc. so talked to a sus engineer and he mentioned that they need to x-ray the welds and do a driving test etc etc which all adds up.
what i ended up doing was putting my standard system back in and locking it with washers. my lines had been looped so i couldnt connect the lines back up, but from a safety stance we knew the hicas unit was now the same strength as stock, the only difference was the HICAS wasnt going to work. now i wasnt sure whether this would be an issue with regency, but i took the chance as i knew other skyline models didnt even come out with HICAS, so it is clearly safe.
but yeh, went through regency and they didnt have an issue with it, the guy i had though wasnt very thorough and he's pretty chilled so im not sure if i go through again whether i will pass or not.