I had that at first but found that they softened up pretty quickly and a quick adjust when the boot was all strapped up stopped anything from getting caught. They're not essential but it feels like they do give a little bit of added support and structure to the boot.
Yeah - this is where the confusion came from. There have been more additions since we (Bristol) started but, as far as I can see, they are related to the appendices and not the main body of the rules.
Looks like you can call it off at any time provided:
a) You are lead jammer.
b) You are not currently in or on the way to the penalty box or have been removed due to equipment malfunction or injury.
Current rules are here: http://wftda.com/rules/wftda-rules.pdf