I'm not an inspector, but I think it was pretty darn obvious that the team was 4607 and not 467. Even more so from a distance-- brains are pretty good at making out patterns.
My opinion means precisely nothing here but they don't seem particularly ambiguous to me. The biggest issue I have is with CIS being printed on them.
Again, my opinion isn't really relevant but it seems a bit pedantic and needlessly picky to say they aren't legal numerals. I suppose that's what you sign up for as an inspector though
