Today, I’ve been pouring over the IBJJF rule book; a little dense, but not a lot that I wasn’t prepared for.
The one thing that stands out: if I’m reading this right, straight foot locks are legal in my division (Masters, white belt); I’ve never learned them, nor their counters, escapes, etc. If I’m wrong, please let me know. I definitely don’t want to freak out over something that I’m reading inaccurately. If you’re curious as to the rules, they’re located here (page 22).