Some other guy interviewed by Norwegian television also came out from the arbiter room, but he didn't get fined. His pants looked like worn jeans, but since it wasn't denim material (only made to look like ugly jeans) it was ok. Highlights how weird the rules are.
I used to frequent fancy private parties with people who mostly all had money and nobility titles (EU). Unless it was a ball (which I used to go to do) that had a strict dress code, most men had nice cars, nice shoes and... Dress jeans.
