Sorry, but it's not a complete and reasonable answer ....
A reasonable answer, takes into account the possibility of verifying legality
in a simple and clear and identified way.
Unfortunately it would be difficult to determine if a scale motor appears realistic by using measurements or proportion because in the 1:1 world there are large variations in the sizes of engines. We could say that every motor must be 1" x 1" x 1" but one could then use a very small v8 that wasn't realistic, while a more scale I4 or smaller engine might be deemed illegal. Thus, we leave the decision up to the event organizer to as to if the scale engine is realistic. Ultimately, the determination of if a vehicle, or a part is 'scale' is always subjective and up to the interpretation of the individual making the decision. This reduces the complexity of the rules, making it easier for a new person to get started so long as they embrace the spirit of scale competition and attempt to build something realistic.
In this case, have you thought about what are the minimum requirements for the pre-race checks ?
Excuse me again, but i always have the impression that in many responses of the Committee, there is awareness that this rules has now become one of the most popular in the world, this consideration should also provide clear answers in the way of expression, as well as easy identification of the limit,
you have to think that the various local committees of other nations must translate your answers into another language.
One consideration that might be of benefit to you is that we encourage groups to modify the rules to fit what works well in your region (for instance, some groups don't run any scale points). If you feel that each scale item should have an associated measurement or something to establish a 'minimum' then you can add it. If it works well, you can propose it and it might get incorporated into the rule set.
I apologize again with you, but my observation wants to be a constructive criticism,
to facilitate the dissemination and application of the regulation also to the extra US Committees,
without misunderstanding or "dark sides" ;-)
No apology necessary, your comments are appreciated "thumbsup"