That's right Sin, if you have changed/modified your chassis to fit a fmic it is defectable but if it fits correctly it is allowed hence the time role have passed through Dickson with fmic. However it the car had a top mount intercooler like WRX's you cannot have a fmic without engineering because your average skyline, Silvia etc has a forward facing intercooler outside the chassis frame oem. Same goes for turbo lasers where they are next to the engine.
The car that was defected out the front of my shop was brads ke70 namely the wheels because they sit 2cm outside the wheel arch (track width issue) yet it is the most outrages thing I have ever seen or have happen around me.
Yet with the recent crack down on the rego stampers and doing "dodgey" Regos it wouldn't have surprised me that they have thought to go down that road however they have.
In saying that I will be lodging a formal complaint with RTA and going to the minister of road and transport and asking him to prove what part of the legislation allows a inspector to deem a vehicle unroadworthy just from walking past it. As well as seeking some form of sub clause in a legislation that removes the right for them defect a vehicle that is parked out the front of a licences motor vehicle repairer.
But I think any forms of ideas/help/backing from a automotive car club etc to pressure the right places. I will also be going around to other mechanical places that have been affected by this recent raid to push harder on them.