The Yenkos were running MV code motor which probably was not certified and were going to be sold new with a 427. So they were not in compliance with federal regs.
That leads to our conclusion of why the Yenko cars got the ACC tag.
this is my opinion based on what I found when researching the 1967-68 Yenkos.
It is hard to believe that Chevy would sell a car to a US dealer that did not meet all the Federal regulations, but if that were the case , it still does not explain the use of the Magic Mirror tag. The statement on the normal 1968 tag is not for engine/emission regulations , it is just to date the safety standards.
Chevy was already in a lot of trouble with the Corvair safety issues so I don't think they would sell a car to any US dealer that did not meet safety laws. More on this later.
I have done a lot of research on the Yenkos as the Magic Mirror tag is an interesting mystery to me.
We know they needed to show special orders or fleet orders on the trim tags, for some reason, and they did use a special order tag the year before on some 1967 Yenko Camaros.
The 68 Camaros with special paint used a special order trim tag but was just omission of the paint code. That was enough to do the job for special paint but I think something more was needed to show a special order car or a fleet order or a COPO order.
What would a 1968 special order Camaro tag look like for a build like a show car, an export, a police, fire, military, or a fleet order if they had to build one?
Not many examples found to do the research on.
Not counting special order paint (dash) tags, what examples do we have for 1968 Camaros?
I only know of the exports, the Yenkos, and two other Camaros with Magic Mirror tags.
We know that GM used special order tags and we have examples from Camaro, Chevelle, Impala, truck, Firebird, and others, where they used numbers or words such as SHOW, MEMO, COPO, SPEC, SPECIAL, and others codes on the tags.
I think they selected the magic mirror tag to show the special order as I have not seen the other codes used like GM used on the other makes and models.
The mystery is why did they use the Magic Mirror tag?
If they just wanted to omit the safety statement, they could have just used a 1967 Camaro tag or another 1967 tag since they did not have the safety statement.
Hard to say what they were thinking, but the magic mirror tag was an old tag. It was used from about 1962 to early 1966 in some plants.
If they wanted an odd ball tag that would stand out as a special order tag, the Magic Mirror tag would do the job.
on the safety statement..........
I did some research on the safety statement looking at what was used in 68-69 by GM, Ford, Chrysler, AMC, and Chevy Trucks. There does not appear to be a Government regulated statement required as they all used different ones. One thing common in all of them is that the build date of that particular vehicle is always associated with the safety statement.
I think that is why GM put it on the trim tags. So the vehicle build date can be cross checked with the cut in date of the Federal regulation. AMC and Chevy trucks used a separate tag with a blank field to stamp the vehicle build date.
The new 1968 regulation cut in dates were for Jan 1st but due to the design and production times, many of the safety features had to be done before the required date.
It looks like the dated safety statement was needed so they can correspond to the regulation versions for that vehicle's build date.
I did not find anything saying there was a Gov requirement for a safety statement as some MFG did not use any so I don't know if that was a problem to omit the safety statement on the 1968 Yenkos.
here is the 1968 Camaro safety statement on the standard tag.........
"GENERAL MOTORS CORPORATION CERTIFIES TO THE DEALER THAT THIS VEHICLE CONFORMS TO ALL FEDERAL MOTOR VEHICLE SAFETY STANDARDS APPLICABLE AT TIME OF MANUFACTURE"
here is some of the 1968 Federal reg........
"In 1968, the precursor agency to The National Highway Traffic Safety Administration (NHTSA) show the safety technologies installed in passenger cars by model year 1968, responding to the initial FMVSS of January 1, 1968, included lap/shoulder or lap belts at all seat positions, energy-absorbing steering assemblies, dual master cylinders, and seat back locks, among others. In addition, model year 1968 passenger cars were equipped with side marker lamps, anticipating a requirement that would take effect on January 1, 1969."