Any "SCALE" molded wings can be used. Lexan wings 10mm maximum height / side dam height

Question about this, not sure about the 10mm height in this rule and what it pertains to. I don't remember seeing this in the previous rule set was it in them? It could have been there and I just didn't see it. USGT has been running at my track for a couple of years and most bodies, protoform being the main one, come with a wing that is being cut at the top line. There is a line below the top line that is probably 10mm, the top is probably 20mm. Is this the height the 10mm in the rule is talking about? This has just come up so we are gathering info and deciding where to go from there. Thanks for any info on this.