You will stand corrected on this one. I rejoined this year after 14 years of no affiliation and little training. Last time I competed in a bench comp it was known as Australian powerlifting federation. The head referee back then told all participants not to use suicide grip.
Fyi I have taken videos and posted them here with a disclaimer that I am not a contender, I even used 100kg instead of my bodyweight of 94. I am having fun only as competing or having affiliation is against the rules of my ASADA recognised organisation.
At over 40 and nowhere near my old pb lifts, you will see on this thread 8 x 140kg and 20 x 100kg feet flat on the floor and arse on the bench in between helping the kids with their homework in the background. I think I might know what I am talking about with respect to the rules.
bench 140kg x 8 and 100kg x 20 - YouTube