It's a general understanding that clubs have, some enforce, some don't. In the past WRX have been one that does enforce it.
Either way, commitee has previous agreed that running a slick increaces corner speed a loading and can therefor increase the impact of a mistake.
It maybe a possibility for a 4pt with side intrusion, but that will need to be discussed.
Essentially we need to promote a high level of safety. WTAC mandates 6pt for Open Class and up.