Disagree. FIDE's dress code has double standards, there was a dude in chinos made to look like jeans and they were allowed. To me it seems like a very antiquated rule that needs to be reworked/abolished to keep up with the times.
You can't call a rule new, which is nagging them for nearly a decade now:
https://www.chess.com/news/view/dress-code-incident-at-world...