I don't know if the rules allow that today.
I pretty much knew already. It's not allowed (obviously) in PL either.Nope, not allowed.
Rule 4.2. 1 of the International Weightlifting Federation, all competitors must wear sport footwear to protect their feet, give them stability and provide a firm stance on the platform
The fans of weightlifting have probably already seen it, but thought I will post it anyway. Well made short documentary about young C&J powerhouse Hampton Morris.